71968240

素因数分解:

$2^4\times 5^1\times {\mathrm{43}}^1\times {\mathrm{20921}}^1$

素因数の和:20977

約数の個数: 40

約数和(自身を含む): 171225648

約数和(自身を除く): 99257408

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 43, 80, 86, 172, 215, 344, 430, 688, 860, 1720, 3440, 20921, 41842, 83684, 104605, 167368, 209210, 334736, 418420, 836840, 899603, 1673680, 1799206, 3598412, 4498015, 7196824, 8996030, 14393648, 17992060, 35984120, 71968240]

約数ペア:

[(1, 71968240), (2, 35984120), (4, 17992060), (5, 14393648), (8, 8996030), (10, 7196824), (16, 4498015), (20, 3598412), (40, 1799206), (43, 1673680), (80, 899603), (86, 836840), (172, 418420), (215, 334736), (344, 209210), (430, 167368), (688, 104605), (860, 83684), (1720, 41842), (3440, 20921)]