81218690

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{131}}^1\times {\mathrm{521}}^1$

素因数の和:683

約数の個数: 64

約数和(自身を含む): 178599168

約数和(自身を除く): 97380478

約数列:

[1, 2, 5, 7, 10, 14, 17, 34, 35, 70, 85, 119, 131, 170, 238, 262, 521, 595, 655, 917, 1042, 1190, 1310, 1834, 2227, 2605, 3647, 4454, 4585, 5210, 7294, 8857, 9170, 11135, 15589, 17714, 18235, 22270, 31178, 36470, 44285, 61999, 68251, 77945, 88570, 123998, 136502, 155890, 309995, 341255, 477757, 619990, 682510, 955514, 1160267, 2320534, 2388785, 4777570, 5801335, 8121869, 11602670, 16243738, 40609345, 81218690]

約数ペア:

[(1, 81218690), (2, 40609345), (5, 16243738), (7, 11602670), (10, 8121869), (14, 5801335), (17, 4777570), (34, 2388785), (35, 2320534), (70, 1160267), (85, 955514), (119, 682510), (131, 619990), (170, 477757), (238, 341255), (262, 309995), (521, 155890), (595, 136502), (655, 123998), (917, 88570), (1042, 77945), (1190, 68251), (1310, 61999), (1834, 44285), (2227, 36470), (2605, 31178), (3647, 22270), (4454, 18235), (4585, 17714), (5210, 15589), (7294, 11135), (8857, 9170)]