21171380

素因数分解:

$2^2\times 5^1\times {\mathrm{53}}^1\times {\mathrm{19973}}^1$

素因数の和:20035

約数の個数: 24

約数和(自身を含む): 45301032

約数和(自身を除く): 24129652

約数列:

[1, 2, 4, 5, 10, 20, 53, 106, 212, 265, 530, 1060, 19973, 39946, 79892, 99865, 199730, 399460, 1058569, 2117138, 4234276, 5292845, 10585690, 21171380]

約数ペア:

[(1, 21171380), (2, 10585690), (4, 5292845), (5, 4234276), (10, 2117138), (20, 1058569), (53, 399460), (106, 199730), (212, 99865), (265, 79892), (530, 39946), (1060, 19973)]