21904520

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{49783}}^1$

素因数の和:49805

約数の個数: 32

約数和(自身を含む): 53766720

約数和(自身を除く): 31862200

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 49783, 99566, 199132, 248915, 398264, 497830, 547613, 995660, 1095226, 1991320, 2190452, 2738065, 4380904, 5476130, 10952260, 21904520]

約数ペア:

[(1, 21904520), (2, 10952260), (4, 5476130), (5, 4380904), (8, 2738065), (10, 2190452), (11, 1991320), (20, 1095226), (22, 995660), (40, 547613), (44, 497830), (55, 398264), (88, 248915), (110, 199132), (220, 99566), (440, 49783)]