21297311

素因数分解:

$7^2\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{691}}^1$

素因数の和:759

約数の個数: 24

約数和(自身を含む): 26979696

約数和(自身を除く): 5682385

約数列:

[1, 7, 17, 37, 49, 119, 259, 629, 691, 833, 1813, 4403, 4837, 11747, 25567, 30821, 33859, 82229, 178969, 434639, 575603, 1252783, 3042473, 21297311]

約数ペア:

[(1, 21297311), (7, 3042473), (17, 1252783), (37, 575603), (49, 434639), (119, 178969), (259, 82229), (629, 33859), (691, 30821), (833, 25567), (1813, 11747), (4403, 4837)]