21173845

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{1279}}^1$

素因数の和:1345

約数の個数: 32

約数和(自身を含む): 32440320

約数和(自身を除く): 11266475

約数列:

[1, 5, 7, 11, 35, 43, 55, 77, 215, 301, 385, 473, 1279, 1505, 2365, 3311, 6395, 8953, 14069, 16555, 44765, 54997, 70345, 98483, 274985, 384979, 492415, 604967, 1924895, 3024835, 4234769, 21173845]

約数ペア:

[(1, 21173845), (5, 4234769), (7, 3024835), (11, 1924895), (35, 604967), (43, 492415), (55, 384979), (77, 274985), (215, 98483), (301, 70345), (385, 54997), (473, 44765), (1279, 16555), (1505, 14069), (2365, 8953), (3311, 6395)]