20820968

素因数分解:

$2^3\times 7^1\times {\mathrm{163}}^1\times {\mathrm{2281}}^1$

素因数の和:2457

約数の個数: 32

約数和(自身を含む): 44909760

約数和(自身を除く): 24088792

約数列:

[1, 2, 4, 7, 8, 14, 28, 56, 163, 326, 652, 1141, 1304, 2281, 2282, 4562, 4564, 9124, 9128, 15967, 18248, 31934, 63868, 127736, 371803, 743606, 1487212, 2602621, 2974424, 5205242, 10410484, 20820968]

約数ペア:

[(1, 20820968), (2, 10410484), (4, 5205242), (7, 2974424), (8, 2602621), (14, 1487212), (28, 743606), (56, 371803), (163, 127736), (326, 63868), (652, 31934), (1141, 18248), (1304, 15967), (2281, 9128), (2282, 9124), (4562, 4564)]