21564680

素因数分解:

$2^3\times 5^1\times {\mathrm{241}}^1\times {\mathrm{2237}}^1$

素因数の和:2489

約数の個数: 32

約数和(自身を含む): 48743640

約数和(自身を除く): 27178960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 241, 482, 964, 1205, 1928, 2237, 2410, 4474, 4820, 8948, 9640, 11185, 17896, 22370, 44740, 89480, 539117, 1078234, 2156468, 2695585, 4312936, 5391170, 10782340, 21564680]

約数ペア:

[(1, 21564680), (2, 10782340), (4, 5391170), (5, 4312936), (8, 2695585), (10, 2156468), (20, 1078234), (40, 539117), (241, 89480), (482, 44740), (964, 22370), (1205, 17896), (1928, 11185), (2237, 9640), (2410, 8948), (4474, 4820)]