20815928

素因数分解:

$2^3\times 7^1\times {\mathrm{331}}^1\times {\mathrm{1123}}^1$

素因数の和:1467

約数の個数: 32

約数和(自身を含む): 44780160

約数和(自身を除く): 23964232

約数列:

[1, 2, 4, 7, 8, 14, 28, 56, 331, 662, 1123, 1324, 2246, 2317, 2648, 4492, 4634, 7861, 8984, 9268, 15722, 18536, 31444, 62888, 371713, 743426, 1486852, 2601991, 2973704, 5203982, 10407964, 20815928]

約数ペア:

[(1, 20815928), (2, 10407964), (4, 5203982), (7, 2973704), (8, 2601991), (14, 1486852), (28, 743426), (56, 371713), (331, 62888), (662, 31444), (1123, 18536), (1324, 15722), (2246, 9268), (2317, 8984), (2648, 7861), (4492, 4634)]