81503780

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^2\times {\mathrm{59}}^1\times {\mathrm{239}}^1$

素因数の和:341

約数の個数: 72

約数和(自身を含む): 185673600

約数和(自身を除く): 104169820

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 59, 68, 85, 118, 170, 236, 239, 289, 295, 340, 478, 578, 590, 956, 1003, 1156, 1180, 1195, 1445, 2006, 2390, 2890, 4012, 4063, 4780, 5015, 5780, 8126, 10030, 14101, 16252, 17051, 20060, 20315, 28202, 34102, 40630, 56404, 68204, 69071, 70505, 81260, 85255, 138142, 141010, 170510, 239717, 276284, 282020, 341020, 345355, 479434, 690710, 958868, 1198585, 1381420, 2397170, 4075189, 4794340, 8150378, 16300756, 20375945, 40751890, 81503780]

約数ペア:

[(1, 81503780), (2, 40751890), (4, 20375945), (5, 16300756), (10, 8150378), (17, 4794340), (20, 4075189), (34, 2397170), (59, 1381420), (68, 1198585), (85, 958868), (118, 690710), (170, 479434), (236, 345355), (239, 341020), (289, 282020), (295, 276284), (340, 239717), (478, 170510), (578, 141010), (590, 138142), (956, 85255), (1003, 81260), (1156, 70505), (1180, 69071), (1195, 68204), (1445, 56404), (2006, 40630), (2390, 34102), (2890, 28202), (4012, 20315), (4063, 20060), (4780, 17051), (5015, 16252), (5780, 14101), (8126, 10030)]