21402220

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{21839}}^1$

素因数の和:21862

約数の個数: 36

約数和(自身を含む): 52284960

約数和(自身を除く): 30882740

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 980, 21839, 43678, 87356, 109195, 152873, 218390, 305746, 436780, 611492, 764365, 1070111, 1528730, 2140222, 3057460, 4280444, 5350555, 10701110, 21402220]

約数ペア:

[(1, 21402220), (2, 10701110), (4, 5350555), (5, 4280444), (7, 3057460), (10, 2140222), (14, 1528730), (20, 1070111), (28, 764365), (35, 611492), (49, 436780), (70, 305746), (98, 218390), (140, 152873), (196, 109195), (245, 87356), (490, 43678), (980, 21839)]