71391640

素因数分解:

$2^3\times 5^1\times {\mathrm{991}}^1\times {\mathrm{1801}}^1$

素因数の和:2803

約数の個数: 32

約数和(自身を含む): 160882560

約数和(自身を除く): 89490920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 991, 1801, 1982, 3602, 3964, 4955, 7204, 7928, 9005, 9910, 14408, 18010, 19820, 36020, 39640, 72040, 1784791, 3569582, 7139164, 8923955, 14278328, 17847910, 35695820, 71391640]

約数ペア:

[(1, 71391640), (2, 35695820), (4, 17847910), (5, 14278328), (8, 8923955), (10, 7139164), (20, 3569582), (40, 1784791), (991, 72040), (1801, 39640), (1982, 36020), (3602, 19820), (3964, 18010), (4955, 14408), (7204, 9910), (7928, 9005)]