221528260

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{257591}}^1$

素因数の和:257643

約数の個数: 24

約数和(自身を含む): 476030016

約数和(自身を除く): 254501756

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 860, 257591, 515182, 1030364, 1287955, 2575910, 5151820, 11076413, 22152826, 44305652, 55382065, 110764130, 221528260]

約数ペア:

[(1, 221528260), (2, 110764130), (4, 55382065), (5, 44305652), (10, 22152826), (20, 11076413), (43, 5151820), (86, 2575910), (172, 1287955), (215, 1030364), (430, 515182), (860, 257591)]