21800790

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^2\times {\mathrm{61}}^1$

素因数の和:123

約数の個数: 144

約数和(自身を含む): 66330576

約数和(自身を除く): 44529786

約数列:

[1, 2, 3, 5, 6, 9, 10, 11, 15, 18, 19, 22, 30, 33, 38, 45, 55, 57, 61, 66, 90, 95, 99, 110, 114, 122, 165, 171, 183, 190, 198, 209, 285, 305, 330, 342, 361, 366, 418, 495, 549, 570, 610, 627, 671, 722, 855, 915, 990, 1045, 1083, 1098, 1159, 1254, 1342, 1710, 1805, 1830, 1881, 2013, 2090, 2166, 2318, 2745, 3135, 3249, 3355, 3477, 3610, 3762, 3971, 4026, 5415, 5490, 5795, 6039, 6270, 6498, 6710, 6954, 7942, 9405, 10065, 10431, 10830, 11590, 11913, 12078, 12749, 16245, 17385, 18810, 19855, 20130, 20862, 22021, 23826, 25498, 30195, 32490, 34770, 35739, 38247, 39710, 44042, 52155, 59565, 60390, 63745, 66063, 71478, 76494, 104310, 110105, 114741, 119130, 127490, 132126, 178695, 191235, 198189, 220210, 229482, 242231, 330315, 357390, 382470, 396378, 484462, 573705, 660630, 726693, 990945, 1147410, 1211155, 1453386, 1981890, 2180079, 2422310, 3633465, 4360158, 7266930, 10900395, 21800790]

約数ペア:

[(1, 21800790), (2, 10900395), (3, 7266930), (5, 4360158), (6, 3633465), (9, 2422310), (10, 2180079), (11, 1981890), (15, 1453386), (18, 1211155), (19, 1147410), (22, 990945), (30, 726693), (33, 660630), (38, 573705), (45, 484462), (55, 396378), (57, 382470), (61, 357390), (66, 330315), (90, 242231), (95, 229482), (99, 220210), (110, 198189), (114, 191235), (122, 178695), (165, 132126), (171, 127490), (183, 119130), (190, 114741), (198, 110105), (209, 104310), (285, 76494), (305, 71478), (330, 66063), (342, 63745), (361, 60390), (366, 59565), (418, 52155), (495, 44042), (549, 39710), (570, 38247), (610, 35739), (627, 34770), (671, 32490), (722, 30195), (855, 25498), (915, 23826), (990, 22021), (1045, 20862), (1083, 20130), (1098, 19855), (1159, 18810), (1254, 17385), (1342, 16245), (1710, 12749), (1805, 12078), (1830, 11913), (1881, 11590), (2013, 10830), (2090, 10431), (2166, 10065), (2318, 9405), (2745, 7942), (3135, 6954), (3249, 6710), (3355, 6498), (3477, 6270), (3610, 6039), (3762, 5795), (3971, 5490), (4026, 5415)]