71823880

素因数分解:

$2^3\times 5^1\times {\mathrm{997}}^1\times {\mathrm{1801}}^1$

素因数の和:2809

約数の個数: 32

約数和(自身を含む): 161855640

約数和(自身を除く): 90031760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 997, 1801, 1994, 3602, 3988, 4985, 7204, 7976, 9005, 9970, 14408, 18010, 19940, 36020, 39880, 72040, 1795597, 3591194, 7182388, 8977985, 14364776, 17955970, 35911940, 71823880]

約数ペア:

[(1, 71823880), (2, 35911940), (4, 17955970), (5, 14364776), (8, 8977985), (10, 7182388), (20, 3591194), (40, 1795597), (997, 72040), (1801, 39880), (1994, 36020), (3602, 19940), (3988, 18010), (4985, 14408), (7204, 9970), (7976, 9005)]