20862640

素因数分解:

$2^4\times 5^1\times {\mathrm{71}}^1\times {\mathrm{3673}}^1$

素因数の和:3757

約数の個数: 40

約数和(自身を含む): 49202208

約数和(自身を除く): 28339568

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 71, 80, 142, 284, 355, 568, 710, 1136, 1420, 2840, 3673, 5680, 7346, 14692, 18365, 29384, 36730, 58768, 73460, 146920, 260783, 293840, 521566, 1043132, 1303915, 2086264, 2607830, 4172528, 5215660, 10431320, 20862640]

約数ペア:

[(1, 20862640), (2, 10431320), (4, 5215660), (5, 4172528), (8, 2607830), (10, 2086264), (16, 1303915), (20, 1043132), (40, 521566), (71, 293840), (80, 260783), (142, 146920), (284, 73460), (355, 58768), (568, 36730), (710, 29384), (1136, 18365), (1420, 14692), (2840, 7346), (3673, 5680)]