12721780

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^2\times {\mathrm{31}}^1\times {\mathrm{71}}^1$

素因数の和:145

約数の個数: 72

約数和(自身を含む): 29707776

約数和(自身を除く): 16985996

約数列:

[1, 2, 4, 5, 10, 17, 20, 31, 34, 62, 68, 71, 85, 124, 142, 155, 170, 284, 289, 310, 340, 355, 527, 578, 620, 710, 1054, 1156, 1207, 1420, 1445, 2108, 2201, 2414, 2635, 2890, 4402, 4828, 5270, 5780, 6035, 8804, 8959, 10540, 11005, 12070, 17918, 20519, 22010, 24140, 35836, 37417, 41038, 44020, 44795, 74834, 82076, 89590, 102595, 149668, 179180, 187085, 205190, 374170, 410380, 636089, 748340, 1272178, 2544356, 3180445, 6360890, 12721780]

約数ペア:

[(1, 12721780), (2, 6360890), (4, 3180445), (5, 2544356), (10, 1272178), (17, 748340), (20, 636089), (31, 410380), (34, 374170), (62, 205190), (68, 187085), (71, 179180), (85, 149668), (124, 102595), (142, 89590), (155, 82076), (170, 74834), (284, 44795), (289, 44020), (310, 41038), (340, 37417), (355, 35836), (527, 24140), (578, 22010), (620, 20519), (710, 17918), (1054, 12070), (1156, 11005), (1207, 10540), (1420, 8959), (1445, 8804), (2108, 6035), (2201, 5780), (2414, 5270), (2635, 4828), (2890, 4402)]