19996840

素因数分解:

$2^3\times 5^1\times {\mathrm{163}}^1\times {\mathrm{3067}}^1$

素因数の和:3241

約数の個数: 32

約数和(自身を含む): 45283680

約数和(自身を除く): 25286840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 163, 326, 652, 815, 1304, 1630, 3067, 3260, 6134, 6520, 12268, 15335, 24536, 30670, 61340, 122680, 499921, 999842, 1999684, 2499605, 3999368, 4999210, 9998420, 19996840]

約数ペア:

[(1, 19996840), (2, 9998420), (4, 4999210), (5, 3999368), (8, 2499605), (10, 1999684), (20, 999842), (40, 499921), (163, 122680), (326, 61340), (652, 30670), (815, 24536), (1304, 15335), (1630, 12268), (3067, 6520), (3260, 6134)]