21737680

素因数分解:

$2^4\times 5^1\times {\mathrm{163}}^1\times {\mathrm{1667}}^1$

素因数の和:1843

約数の個数: 40

約数和(自身を含む): 50880672

約数和(自身を除く): 29142992

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 163, 326, 652, 815, 1304, 1630, 1667, 2608, 3260, 3334, 6520, 6668, 8335, 13040, 13336, 16670, 26672, 33340, 66680, 133360, 271721, 543442, 1086884, 1358605, 2173768, 2717210, 4347536, 5434420, 10868840, 21737680]

約数ペア:

[(1, 21737680), (2, 10868840), (4, 5434420), (5, 4347536), (8, 2717210), (10, 2173768), (16, 1358605), (20, 1086884), (40, 543442), (80, 271721), (163, 133360), (326, 66680), (652, 33340), (815, 26672), (1304, 16670), (1630, 13336), (1667, 13040), (2608, 8335), (3260, 6668), (3334, 6520)]