20019685

素因数分解:

$5^1\times 7^2\times {\mathrm{41}}^1\times {\mathrm{1993}}^1$

素因数の和:2053

約数の個数: 24

約数和(自身を含む): 28641816

約数和(自身を除く): 8622131

約数列:

[1, 5, 7, 35, 41, 49, 205, 245, 287, 1435, 1993, 2009, 9965, 10045, 13951, 69755, 81713, 97657, 408565, 488285, 571991, 2859955, 4003937, 20019685]

約数ペア:

[(1, 20019685), (5, 4003937), (7, 2859955), (35, 571991), (41, 488285), (49, 408565), (205, 97657), (245, 81713), (287, 69755), (1435, 13951), (1993, 10045), (2009, 9965)]