21078940

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{36343}}^1$

素因数の和:36381

約数の個数: 24

約数和(自身を含む): 45793440

約数和(自身を除く): 24714500

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 116, 145, 290, 580, 36343, 72686, 145372, 181715, 363430, 726860, 1053947, 2107894, 4215788, 5269735, 10539470, 21078940]

約数ペア:

[(1, 21078940), (2, 10539470), (4, 5269735), (5, 4215788), (10, 2107894), (20, 1053947), (29, 726860), (58, 363430), (116, 181715), (145, 145372), (290, 72686), (580, 36343)]