21175408

素因数分解:

$2^4\times {\mathrm{53}}^1\times {\mathrm{24971}}^1$

素因数の和:25032

約数の個数: 20

約数和(自身を含む): 41803128

約数和(自身を除く): 20627720

約数列:

[1, 2, 4, 8, 16, 53, 106, 212, 424, 848, 24971, 49942, 99884, 199768, 399536, 1323463, 2646926, 5293852, 10587704, 21175408]

約数ペア:

[(1, 21175408), (2, 10587704), (4, 5293852), (8, 2646926), (16, 1323463), (53, 399536), (106, 199768), (212, 99884), (424, 49942), (848, 24971)]