21090872

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{3929}}^1$

素因数の和:4007

約数の個数: 32

約数和(自身を含む): 43858800

約数和(自身を除く): 22767928

約数列:

[1, 2, 4, 8, 11, 22, 44, 61, 88, 122, 244, 488, 671, 1342, 2684, 3929, 5368, 7858, 15716, 31432, 43219, 86438, 172876, 239669, 345752, 479338, 958676, 1917352, 2636359, 5272718, 10545436, 21090872]

約数ペア:

[(1, 21090872), (2, 10545436), (4, 5272718), (8, 2636359), (11, 1917352), (22, 958676), (44, 479338), (61, 345752), (88, 239669), (122, 172876), (244, 86438), (488, 43219), (671, 31432), (1342, 15716), (2684, 7858), (3929, 5368)]