21575620

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{101}}^1\times {\mathrm{971}}^1$

素因数の和:1092

約数の個数: 48

約数和(自身を含む): 49968576

約数和(自身を除く): 28392956

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 101, 110, 202, 220, 404, 505, 971, 1010, 1111, 1942, 2020, 2222, 3884, 4444, 4855, 5555, 9710, 10681, 11110, 19420, 21362, 22220, 42724, 53405, 98071, 106810, 196142, 213620, 392284, 490355, 980710, 1078781, 1961420, 2157562, 4315124, 5393905, 10787810, 21575620]

約数ペア:

[(1, 21575620), (2, 10787810), (4, 5393905), (5, 4315124), (10, 2157562), (11, 1961420), (20, 1078781), (22, 980710), (44, 490355), (55, 392284), (101, 213620), (110, 196142), (202, 106810), (220, 98071), (404, 53405), (505, 42724), (971, 22220), (1010, 21362), (1111, 19420), (1942, 11110), (2020, 10681), (2222, 9710), (3884, 5555), (4444, 4855)]