1981980

素因数分解:

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

素因数の和:57

約数の個数: 216

約数和(自身を含む): 8133216

約数和(自身を除く): 6151236

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 11, 12, 13, 14, 15, 18, 20, 21, 22, 26, 28, 30, 33, 35, 36, 39, 42, 44, 45, 52, 55, 60, 63, 65, 66, 70, 77, 78, 84, 90, 91, 99, 105, 110, 117, 121, 126, 130, 132, 140, 143, 154, 156, 165, 180, 182, 195, 198, 210, 220, 231, 234, 242, 252, 260, 273, 286, 308, 315, 330, 363, 364, 385, 390, 396, 420, 429, 455, 462, 468, 484, 495, 546, 572, 585, 605, 630, 660, 693, 715, 726, 770, 780, 819, 847, 858, 910, 924, 990, 1001, 1089, 1092, 1155, 1170, 1210, 1260, 1287, 1365, 1386, 1430, 1452, 1540, 1573, 1638, 1694, 1716, 1815, 1820, 1980, 2002, 2145, 2178, 2310, 2340, 2420, 2541, 2574, 2730, 2772, 2860, 3003, 3146, 3276, 3388, 3465, 3630, 4004, 4095, 4235, 4290, 4356, 4620, 4719, 5005, 5082, 5148, 5445, 5460, 6006, 6292, 6435, 6930, 7260, 7623, 7865, 8190, 8470, 8580, 9009, 9438, 10010, 10164, 10890, 11011, 12012, 12705, 12870, 13860, 14157, 15015, 15246, 15730, 16380, 16940, 18018, 18876, 20020, 21780, 22022, 23595, 25410, 25740, 28314, 30030, 30492, 31460, 33033, 36036, 38115, 44044, 45045, 47190, 50820, 55055, 56628, 60060, 66066, 70785, 76230, 90090, 94380, 99099, 110110, 132132, 141570, 152460, 165165, 180180, 198198, 220220, 283140, 330330, 396396, 495495, 660660, 990990, 1981980]

約数ペア:

[(1, 1981980), (2, 990990), (3, 660660), (4, 495495), (5, 396396), (6, 330330), (7, 283140), (9, 220220), (10, 198198), (11, 180180), (12, 165165), (13, 152460), (14, 141570), (15, 132132), (18, 110110), (20, 99099), (21, 94380), (22, 90090), (26, 76230), (28, 70785), (30, 66066), (33, 60060), (35, 56628), (36, 55055), (39, 50820), (42, 47190), (44, 45045), (45, 44044), (52, 38115), (55, 36036), (60, 33033), (63, 31460), (65, 30492), (66, 30030), (70, 28314), (77, 25740), (78, 25410), (84, 23595), (90, 22022), (91, 21780), (99, 20020), (105, 18876), (110, 18018), (117, 16940), (121, 16380), (126, 15730), (130, 15246), (132, 15015), (140, 14157), (143, 13860), (154, 12870), (156, 12705), (165, 12012), (180, 11011), (182, 10890), (195, 10164), (198, 10010), (210, 9438), (220, 9009), (231, 8580), (234, 8470), (242, 8190), (252, 7865), (260, 7623), (273, 7260), (286, 6930), (308, 6435), (315, 6292), (330, 6006), (363, 5460), (364, 5445), (385, 5148), (390, 5082), (396, 5005), (420, 4719), (429, 4620), (455, 4356), (462, 4290), (468, 4235), (484, 4095), (495, 4004), (546, 3630), (572, 3465), (585, 3388), (605, 3276), (630, 3146), (660, 3003), (693, 2860), (715, 2772), (726, 2730), (770, 2574), (780, 2541), (819, 2420), (847, 2340), (858, 2310), (910, 2178), (924, 2145), (990, 2002), (1001, 1980), (1089, 1820), (1092, 1815), (1155, 1716), (1170, 1694), (1210, 1638), (1260, 1573), (1287, 1540), (1365, 1452), (1386, 1430)]