21845980

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{1151}}^1$

素因数の和:1246

約数の個数: 48

約数和(自身を含む): 50125824

約数和(自身を除く): 28279844

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 73, 130, 146, 260, 292, 365, 730, 949, 1151, 1460, 1898, 2302, 3796, 4604, 4745, 5755, 9490, 11510, 14963, 18980, 23020, 29926, 59852, 74815, 84023, 149630, 168046, 299260, 336092, 420115, 840230, 1092299, 1680460, 2184598, 4369196, 5461495, 10922990, 21845980]

約数ペア:

[(1, 21845980), (2, 10922990), (4, 5461495), (5, 4369196), (10, 2184598), (13, 1680460), (20, 1092299), (26, 840230), (52, 420115), (65, 336092), (73, 299260), (130, 168046), (146, 149630), (260, 84023), (292, 74815), (365, 59852), (730, 29926), (949, 23020), (1151, 18980), (1460, 14963), (1898, 11510), (2302, 9490), (3796, 5755), (4604, 4745)]