21477940

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{233}}^1\times {\mathrm{419}}^1$

素因数の和:672

約数の個数: 48

約数和(自身を含む): 49533120

約数和(自身を除く): 28055180

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 233, 419, 466, 838, 932, 1165, 1676, 2095, 2330, 2563, 4190, 4609, 4660, 5126, 8380, 9218, 10252, 12815, 18436, 23045, 25630, 46090, 51260, 92180, 97627, 195254, 390508, 488135, 976270, 1073897, 1952540, 2147794, 4295588, 5369485, 10738970, 21477940]

約数ペア:

[(1, 21477940), (2, 10738970), (4, 5369485), (5, 4295588), (10, 2147794), (11, 1952540), (20, 1073897), (22, 976270), (44, 488135), (55, 390508), (110, 195254), (220, 97627), (233, 92180), (419, 51260), (466, 46090), (838, 25630), (932, 23045), (1165, 18436), (1676, 12815), (2095, 10252), (2330, 9218), (2563, 8380), (4190, 5126), (4609, 4660)]