21355640

素因数分解:

$2^3\times 5^1\times {\mathrm{59}}^1\times {\mathrm{9049}}^1$

素因数の和:9119

約数の個数: 32

約数和(自身を含む): 48870000

約数和(自身を除く): 27514360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 59, 118, 236, 295, 472, 590, 1180, 2360, 9049, 18098, 36196, 45245, 72392, 90490, 180980, 361960, 533891, 1067782, 2135564, 2669455, 4271128, 5338910, 10677820, 21355640]

約数ペア:

[(1, 21355640), (2, 10677820), (4, 5338910), (5, 4271128), (8, 2669455), (10, 2135564), (20, 1067782), (40, 533891), (59, 361960), (118, 180980), (236, 90490), (295, 72392), (472, 45245), (590, 36196), (1180, 18098), (2360, 9049)]