18972513

素因数分解:

$3^2\times 7^1\times {\mathrm{401}}^1\times {\mathrm{751}}^1$

素因数の和:1165

約数の個数: 24

約数和(自身を含む): 31439616

約数和(自身を除く): 12467103

約数列:

[1, 3, 7, 9, 21, 63, 401, 751, 1203, 2253, 2807, 3609, 5257, 6759, 8421, 15771, 25263, 47313, 301151, 903453, 2108057, 2710359, 6324171, 18972513]

約数ペア:

[(1, 18972513), (3, 6324171), (7, 2710359), (9, 2108057), (21, 903453), (63, 301151), (401, 47313), (751, 25263), (1203, 15771), (2253, 8421), (2807, 6759), (3609, 5257)]