20987638

素因数分解:

$2^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{65179}}^1$

素因数の和:65211

約数の個数: 16

約数和(自身を含む): 37543680

約数和(自身を除く): 16556042

約数列:

[1, 2, 7, 14, 23, 46, 161, 322, 65179, 130358, 456253, 912506, 1499117, 2998234, 10493819, 20987638]

約数ペア:

[(1, 20987638), (2, 10493819), (7, 2998234), (14, 1499117), (23, 912506), (46, 456253), (161, 130358), (322, 65179)]