18840157

素因数分解:

$7^2\times {\mathrm{31}}^1\times {\mathrm{79}}^1\times {\mathrm{157}}^1$

素因数の和:281

約数の個数: 24

約数和(自身を含む): 23055360

約数和(自身を除く): 4215203

約数列:

[1, 7, 31, 49, 79, 157, 217, 553, 1099, 1519, 2449, 3871, 4867, 7693, 12403, 17143, 34069, 86821, 120001, 238483, 384493, 607747, 2691451, 18840157]

約数ペア:

[(1, 18840157), (7, 2691451), (31, 607747), (49, 384493), (79, 238483), (157, 120001), (217, 86821), (553, 34069), (1099, 17143), (1519, 12403), (2449, 7693), (3871, 4867)]