21359120

素因数分解:

$2^4\times 5^1\times {\mathrm{313}}^1\times {\mathrm{853}}^1$

素因数の和:1179

約数の個数: 40

約数和(自身を含む): 49877016

約数和(自身を除く): 28517896

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 313, 626, 853, 1252, 1565, 1706, 2504, 3130, 3412, 4265, 5008, 6260, 6824, 8530, 12520, 13648, 17060, 25040, 34120, 68240, 266989, 533978, 1067956, 1334945, 2135912, 2669890, 4271824, 5339780, 10679560, 21359120]

約数ペア:

[(1, 21359120), (2, 10679560), (4, 5339780), (5, 4271824), (8, 2669890), (10, 2135912), (16, 1334945), (20, 1067956), (40, 533978), (80, 266989), (313, 68240), (626, 34120), (853, 25040), (1252, 17060), (1565, 13648), (1706, 12520), (2504, 8530), (3130, 6824), (3412, 6260), (4265, 5008)]