15721820

素因数分解:

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

素因数の和:2101

約数の個数: 24

約数和(自身を含む): 33103728

約数和(自身を除く): 17381908

約数列:

[1, 2, 4, 5, 10, 20, 491, 982, 1601, 1964, 2455, 3202, 4910, 6404, 8005, 9820, 16010, 32020, 786091, 1572182, 3144364, 3930455, 7860910, 15721820]

約数ペア:

[(1, 15721820), (2, 7860910), (4, 3930455), (5, 3144364), (10, 1572182), (20, 786091), (491, 32020), (982, 16010), (1601, 9820), (1964, 8005), (2455, 6404), (3202, 4910)]