20381740

素因数分解:

$2^2\times 5^1\times {\mathrm{157}}^1\times {\mathrm{6491}}^1$

素因数の和:6657

約数の個数: 24

約数和(自身を含む): 43080912

約数和(自身を除く): 22699172

約数列:

[1, 2, 4, 5, 10, 20, 157, 314, 628, 785, 1570, 3140, 6491, 12982, 25964, 32455, 64910, 129820, 1019087, 2038174, 4076348, 5095435, 10190870, 20381740]

約数ペア:

[(1, 20381740), (2, 10190870), (4, 5095435), (5, 4076348), (10, 2038174), (20, 1019087), (157, 129820), (314, 64910), (628, 32455), (785, 25964), (1570, 12982), (3140, 6491)]