20119640

素因数分解:

$2^3\times 5^1\times {\mathrm{313}}^1\times {\mathrm{1607}}^1$

素因数の和:1931

約数の個数: 32

約数和(自身を含む): 45442080

約数和(自身を除く): 25322440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 313, 626, 1252, 1565, 1607, 2504, 3130, 3214, 6260, 6428, 8035, 12520, 12856, 16070, 32140, 64280, 502991, 1005982, 2011964, 2514955, 4023928, 5029910, 10059820, 20119640]

約数ペア:

[(1, 20119640), (2, 10059820), (4, 5029910), (5, 4023928), (8, 2514955), (10, 2011964), (20, 1005982), (40, 502991), (313, 64280), (626, 32140), (1252, 16070), (1565, 12856), (1607, 12520), (2504, 8035), (3130, 6428), (3214, 6260)]