21811853

素因数分解:

$7^1\times {\mathrm{89}}^1\times {\mathrm{157}}^1\times {\mathrm{223}}^1$

素因数の和:476

約数の個数: 16

約数和(自身を含む): 25482240

約数和(自身を除く): 3670387

約数列:

[1, 7, 89, 157, 223, 623, 1099, 1561, 13973, 19847, 35011, 97811, 138929, 245077, 3115979, 21811853]

約数ペア:

[(1, 21811853), (7, 3115979), (89, 245077), (157, 138929), (223, 97811), (623, 35011), (1099, 19847), (1561, 13973)]