21813860

素因数分解:

$2^2\times 5^1\times {\mathrm{67}}^1\times {\mathrm{73}}^1\times {\mathrm{223}}^1$

素因数の和:372

約数の個数: 48

約数和(自身を含む): 47341056

約数和(自身を除く): 25527196

約数列:

[1, 2, 4, 5, 10, 20, 67, 73, 134, 146, 223, 268, 292, 335, 365, 446, 670, 730, 892, 1115, 1340, 1460, 2230, 4460, 4891, 9782, 14941, 16279, 19564, 24455, 29882, 32558, 48910, 59764, 65116, 74705, 81395, 97820, 149410, 162790, 298820, 325580, 1090693, 2181386, 4362772, 5453465, 10906930, 21813860]

約数ペア:

[(1, 21813860), (2, 10906930), (4, 5453465), (5, 4362772), (10, 2181386), (20, 1090693), (67, 325580), (73, 298820), (134, 162790), (146, 149410), (223, 97820), (268, 81395), (292, 74705), (335, 65116), (365, 59764), (446, 48910), (670, 32558), (730, 29882), (892, 24455), (1115, 19564), (1340, 16279), (1460, 14941), (2230, 9782), (4460, 4891)]