18238420

素因数分解:

$2^2\times 5^1\times {\mathrm{83}}^1\times {\mathrm{10987}}^1$

素因数の和:11079

約数の個数: 24

約数和(自身を含む): 38765664

約数和(自身を除く): 20527244

約数列:

[1, 2, 4, 5, 10, 20, 83, 166, 332, 415, 830, 1660, 10987, 21974, 43948, 54935, 109870, 219740, 911921, 1823842, 3647684, 4559605, 9119210, 18238420]

約数ペア:

[(1, 18238420), (2, 9119210), (4, 4559605), (5, 3647684), (10, 1823842), (20, 911921), (83, 219740), (166, 109870), (332, 54935), (415, 43948), (830, 21974), (1660, 10987)]