21553931

素因数分解:

$7^1\times {\mathrm{29}}^1\times {\mathrm{89}}^1\times {\mathrm{1193}}^1$

素因数の和:1318

約数の個数: 16

約数和(自身を含む): 25790400

約数和(自身を除く): 4236469

約数列:

[1, 7, 29, 89, 203, 623, 1193, 2581, 8351, 18067, 34597, 106177, 242179, 743239, 3079133, 21553931]

約数ペア:

[(1, 21553931), (7, 3079133), (29, 743239), (89, 242179), (203, 106177), (623, 34597), (1193, 18067), (2581, 8351)]