20646800

素因数分解:

$2^4\times 5^2\times {\mathrm{71}}^1\times {\mathrm{727}}^1$

素因数の和:816

約数の個数: 60

約数和(自身を含む): 50371776

約数和(自身を除く): 29724976

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 71, 80, 100, 142, 200, 284, 355, 400, 568, 710, 727, 1136, 1420, 1454, 1775, 2840, 2908, 3550, 3635, 5680, 5816, 7100, 7270, 11632, 14200, 14540, 18175, 28400, 29080, 36350, 51617, 58160, 72700, 103234, 145400, 206468, 258085, 290800, 412936, 516170, 825872, 1032340, 1290425, 2064680, 2580850, 4129360, 5161700, 10323400, 20646800]

約数ペア:

[(1, 20646800), (2, 10323400), (4, 5161700), (5, 4129360), (8, 2580850), (10, 2064680), (16, 1290425), (20, 1032340), (25, 825872), (40, 516170), (50, 412936), (71, 290800), (80, 258085), (100, 206468), (142, 145400), (200, 103234), (284, 72700), (355, 58160), (400, 51617), (568, 36350), (710, 29080), (727, 28400), (1136, 18175), (1420, 14540), (1454, 14200), (1775, 11632), (2840, 7270), (2908, 7100), (3550, 5816), (3635, 5680)]