21390620

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{34501}}^1$

素因数の和:34541

約数の個数: 24

約数和(自身を含む): 46370688

約数和(自身を除く): 24980068

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 34501, 69002, 138004, 172505, 345010, 690020, 1069531, 2139062, 4278124, 5347655, 10695310, 21390620]

約数ペア:

[(1, 21390620), (2, 10695310), (4, 5347655), (5, 4278124), (10, 2139062), (20, 1069531), (31, 690020), (62, 345010), (124, 172505), (155, 138004), (310, 69002), (620, 34501)]