31443640

素因数分解:

$2^3\times 5^1\times {\mathrm{491}}^1\times {\mathrm{1601}}^1$

素因数の和:2103

約数の個数: 32

約数和(自身を含む): 70936560

約数和(自身を除く): 39492920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 491, 982, 1601, 1964, 2455, 3202, 3928, 4910, 6404, 8005, 9820, 12808, 16010, 19640, 32020, 64040, 786091, 1572182, 3144364, 3930455, 6288728, 7860910, 15721820, 31443640]

約数ペア:

[(1, 31443640), (2, 15721820), (4, 7860910), (5, 6288728), (8, 3930455), (10, 3144364), (20, 1572182), (40, 786091), (491, 64040), (982, 32020), (1601, 19640), (1964, 16010), (2455, 12808), (3202, 9820), (3928, 8005), (4910, 6404)]