19245220

素因数分解:

$2^2\times 5^1\times {\mathrm{971}}^1\times {\mathrm{991}}^1$

素因数の和:1971

約数の個数: 24

約数和(自身を含む): 40497408

約数和(自身を除く): 21252188

約数列:

[1, 2, 4, 5, 10, 20, 971, 991, 1942, 1982, 3884, 3964, 4855, 4955, 9710, 9910, 19420, 19820, 962261, 1924522, 3849044, 4811305, 9622610, 19245220]

約数ペア:

[(1, 19245220), (2, 9622610), (4, 4811305), (5, 3849044), (10, 1924522), (20, 962261), (971, 19820), (991, 19420), (1942, 9910), (1982, 9710), (3884, 4955), (3964, 4855)]