21551117980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{409}}^1\times {\mathrm{376373}}^1$

素因数の和:376798

約数の個数: 48

約数和(自身を含む): 51849282240

約数和(自身を除く): 30298164260

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 409, 818, 1636, 2045, 2863, 4090, 5726, 8180, 11452, 14315, 28630, 57260, 376373, 752746, 1505492, 1881865, 2634611, 3763730, 5269222, 7527460, 10538444, 13173055, 26346110, 52692220, 153936557, 307873114, 615746228, 769682785, 1077555899, 1539365570, 2155111798, 3078731140, 4310223596, 5387779495, 10775558990, 21551117980]

約数ペア:

[(1, 21551117980), (2, 10775558990), (4, 5387779495), (5, 4310223596), (7, 3078731140), (10, 2155111798), (14, 1539365570), (20, 1077555899), (28, 769682785), (35, 615746228), (70, 307873114), (140, 153936557), (409, 52692220), (818, 26346110), (1636, 13173055), (2045, 10538444), (2863, 7527460), (4090, 5269222), (5726, 3763730), (8180, 2634611), (11452, 1881865), (14315, 1505492), (28630, 752746), (57260, 376373)]