21891870

素因数分解:

$2^1\times 3^7\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1$

素因数の和:59

約数の個数: 256

約数和(自身を含む): 79349760

約数和(自身を除く): 57457890

約数列:

[1, 2, 3, 5, 6, 7, 9, 10, 11, 13, 14, 15, 18, 21, 22, 26, 27, 30, 33, 35, 39, 42, 45, 54, 55, 63, 65, 66, 70, 77, 78, 81, 90, 91, 99, 105, 110, 117, 126, 130, 135, 143, 154, 162, 165, 182, 189, 195, 198, 210, 231, 234, 243, 270, 273, 286, 297, 315, 330, 351, 378, 385, 390, 405, 429, 455, 462, 486, 495, 546, 567, 585, 594, 630, 693, 702, 715, 729, 770, 810, 819, 858, 891, 910, 945, 990, 1001, 1053, 1134, 1155, 1170, 1215, 1287, 1365, 1386, 1430, 1458, 1485, 1638, 1701, 1755, 1782, 1890, 2002, 2079, 2106, 2145, 2187, 2310, 2430, 2457, 2574, 2673, 2730, 2835, 2970, 3003, 3159, 3402, 3465, 3510, 3645, 3861, 4095, 4158, 4290, 4374, 4455, 4914, 5005, 5103, 5265, 5346, 5670, 6006, 6237, 6318, 6435, 6930, 7290, 7371, 7722, 8019, 8190, 8505, 8910, 9009, 9477, 10010, 10206, 10395, 10530, 10935, 11583, 12285, 12474, 12870, 13365, 14742, 15015, 15309, 15795, 16038, 17010, 18018, 18711, 18954, 19305, 20790, 21870, 22113, 23166, 24057, 24570, 25515, 26730, 27027, 28431, 30030, 30618, 31185, 31590, 34749, 36855, 37422, 38610, 40095, 44226, 45045, 47385, 48114, 51030, 54054, 56133, 56862, 57915, 62370, 66339, 69498, 73710, 76545, 80190, 81081, 90090, 93555, 94770, 104247, 110565, 112266, 115830, 120285, 132678, 135135, 142155, 153090, 162162, 168399, 173745, 187110, 199017, 208494, 221130, 240570, 243243, 270270, 280665, 284310, 312741, 331695, 336798, 347490, 398034, 405405, 486486, 521235, 561330, 625482, 663390, 729729, 810810, 841995, 995085, 1042470, 1216215, 1459458, 1563705, 1683990, 1990170, 2189187, 2432430, 3127410, 3648645, 4378374, 7297290, 10945935, 21891870]

約数ペア:

[(1, 21891870), (2, 10945935), (3, 7297290), (5, 4378374), (6, 3648645), (7, 3127410), (9, 2432430), (10, 2189187), (11, 1990170), (13, 1683990), (14, 1563705), (15, 1459458), (18, 1216215), (21, 1042470), (22, 995085), (26, 841995), (27, 810810), (30, 729729), (33, 663390), (35, 625482), (39, 561330), (42, 521235), (45, 486486), (54, 405405), (55, 398034), (63, 347490), (65, 336798), (66, 331695), (70, 312741), (77, 284310), (78, 280665), (81, 270270), (90, 243243), (91, 240570), (99, 221130), (105, 208494), (110, 199017), (117, 187110), (126, 173745), (130, 168399), (135, 162162), (143, 153090), (154, 142155), (162, 135135), (165, 132678), (182, 120285), (189, 115830), (195, 112266), (198, 110565), (210, 104247), (231, 94770), (234, 93555), (243, 90090), (270, 81081), (273, 80190), (286, 76545), (297, 73710), (315, 69498), (330, 66339), (351, 62370), (378, 57915), (385, 56862), (390, 56133), (405, 54054), (429, 51030), (455, 48114), (462, 47385), (486, 45045), (495, 44226), (546, 40095), (567, 38610), (585, 37422), (594, 36855), (630, 34749), (693, 31590), (702, 31185), (715, 30618), (729, 30030), (770, 28431), (810, 27027), (819, 26730), (858, 25515), (891, 24570), (910, 24057), (945, 23166), (990, 22113), (1001, 21870), (1053, 20790), (1134, 19305), (1155, 18954), (1170, 18711), (1215, 18018), (1287, 17010), (1365, 16038), (1386, 15795), (1430, 15309), (1458, 15015), (1485, 14742), (1638, 13365), (1701, 12870), (1755, 12474), (1782, 12285), (1890, 11583), (2002, 10935), (2079, 10530), (2106, 10395), (2145, 10206), (2187, 10010), (2310, 9477), (2430, 9009), (2457, 8910), (2574, 8505), (2673, 8190), (2730, 8019), (2835, 7722), (2970, 7371), (3003, 7290), (3159, 6930), (3402, 6435), (3465, 6318), (3510, 6237), (3645, 6006), (3861, 5670), (4095, 5346), (4158, 5265), (4290, 5103), (4374, 5005), (4455, 4914)]