21720490

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{379}}^1\times {\mathrm{521}}^1$

素因数の和:918

約数の個数: 32

約数和(自身を含む): 42845760

約数和(自身を除く): 21125270

約数列:

[1, 2, 5, 10, 11, 22, 55, 110, 379, 521, 758, 1042, 1895, 2605, 3790, 4169, 5210, 5731, 8338, 11462, 20845, 28655, 41690, 57310, 197459, 394918, 987295, 1974590, 2172049, 4344098, 10860245, 21720490]

約数ペア:

[(1, 21720490), (2, 10860245), (5, 4344098), (10, 2172049), (11, 1974590), (22, 987295), (55, 394918), (110, 197459), (379, 57310), (521, 41690), (758, 28655), (1042, 20845), (1895, 11462), (2605, 8338), (3790, 5731), (4169, 5210)]