21890420

素因数分解:

$2^2\times 5^1\times {\mathrm{83}}^1\times {\mathrm{13187}}^1$

素因数の和:13279

約数の個数: 24

約数和(自身を含む): 46527264

約数和(自身を除く): 24636844

約数列:

[1, 2, 4, 5, 10, 20, 83, 166, 332, 415, 830, 1660, 13187, 26374, 52748, 65935, 131870, 263740, 1094521, 2189042, 4378084, 5472605, 10945210, 21890420]

約数ペア:

[(1, 21890420), (2, 10945210), (4, 5472605), (5, 4378084), (10, 2189042), (20, 1094521), (83, 263740), (166, 131870), (332, 65935), (415, 52748), (830, 26374), (1660, 13187)]