21416525

素因数分解:

$5^2\times {\mathrm{13}}^2\times {\mathrm{37}}^1\times {\mathrm{137}}^1$

素因数の和:210

約数の個数: 36

約数和(自身を含む): 29749212

約数和(自身を除く): 8332687

約数列:

[1, 5, 13, 25, 37, 65, 137, 169, 185, 325, 481, 685, 845, 925, 1781, 2405, 3425, 4225, 5069, 6253, 8905, 12025, 23153, 25345, 31265, 44525, 65897, 115765, 126725, 156325, 329485, 578825, 856661, 1647425, 4283305, 21416525]

約数ペア:

[(1, 21416525), (5, 4283305), (13, 1647425), (25, 856661), (37, 578825), (65, 329485), (137, 156325), (169, 126725), (185, 115765), (325, 65897), (481, 44525), (685, 31265), (845, 25345), (925, 23153), (1781, 12025), (2405, 8905), (3425, 6253), (4225, 5069)]