1815820

素因数分解:

$2^2\times 5^1\times {\mathrm{163}}^1\times {\mathrm{557}}^1$

素因数の和:729

約数の個数: 24

約数和(自身を含む): 3843504

約数和(自身を除く): 2027684

約数列:

[1, 2, 4, 5, 10, 20, 163, 326, 557, 652, 815, 1114, 1630, 2228, 2785, 3260, 5570, 11140, 90791, 181582, 363164, 453955, 907910, 1815820]

約数ペア:

[(1, 1815820), (2, 907910), (4, 453955), (5, 363164), (10, 181582), (20, 90791), (163, 11140), (326, 5570), (557, 3260), (652, 2785), (815, 2228), (1114, 1630)]