21052420

素因数分解:

$2^2\times 5^1\times {\mathrm{151}}^1\times {\mathrm{6971}}^1$

素因数の和:7131

約数の個数: 24

約数和(自身を含む): 44509248

約数和(自身を除く): 23456828

約数列:

[1, 2, 4, 5, 10, 20, 151, 302, 604, 755, 1510, 3020, 6971, 13942, 27884, 34855, 69710, 139420, 1052621, 2105242, 4210484, 5263105, 10526210, 21052420]

約数ペア:

[(1, 21052420), (2, 10526210), (4, 5263105), (5, 4210484), (10, 2105242), (20, 1052621), (151, 139420), (302, 69710), (604, 34855), (755, 27884), (1510, 13942), (3020, 6971)]