21729428

素因数分解:

$2^2\times 7^1\times {\mathrm{157}}^1\times {\mathrm{4943}}^1$

素因数の和:5111

約数の個数: 24

約数和(自身を含む): 43744512

約数和(自身を除く): 22015084

約数列:

[1, 2, 4, 7, 14, 28, 157, 314, 628, 1099, 2198, 4396, 4943, 9886, 19772, 34601, 69202, 138404, 776051, 1552102, 3104204, 5432357, 10864714, 21729428]

約数ペア:

[(1, 21729428), (2, 10864714), (4, 5432357), (7, 3104204), (14, 1552102), (28, 776051), (157, 138404), (314, 69202), (628, 34601), (1099, 19772), (2198, 9886), (4396, 4943)]