21209140

素因数分解:

$2^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{28661}}^1$

素因数の和:28707

約数の個数: 24

約数和(自身を含む): 45744552

約数和(自身を除く): 24535412

約数列:

[1, 2, 4, 5, 10, 20, 37, 74, 148, 185, 370, 740, 28661, 57322, 114644, 143305, 286610, 573220, 1060457, 2120914, 4241828, 5302285, 10604570, 21209140]

約数ペア:

[(1, 21209140), (2, 10604570), (4, 5302285), (5, 4241828), (10, 2120914), (20, 1060457), (37, 573220), (74, 286610), (148, 143305), (185, 114644), (370, 57322), (740, 28661)]