21373040

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{20551}}^1$

素因数の和:20577

約数の個数: 40

約数和(自身を含む): 53517408

約数和(自身を除く): 32144368

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 20551, 41102, 82204, 102755, 164408, 205510, 267163, 328816, 411020, 534326, 822040, 1068652, 1335815, 1644080, 2137304, 2671630, 4274608, 5343260, 10686520, 21373040]

約数ペア:

[(1, 21373040), (2, 10686520), (4, 5343260), (5, 4274608), (8, 2671630), (10, 2137304), (13, 1644080), (16, 1335815), (20, 1068652), (26, 822040), (40, 534326), (52, 411020), (65, 328816), (80, 267163), (104, 205510), (130, 164408), (208, 102755), (260, 82204), (520, 41102), (1040, 20551)]