21670985

素因数分解:

$5^1\times 7^2\times {\mathrm{197}}^1\times {\mathrm{449}}^1$

素因数の和:665

約数の個数: 24

約数和(自身を含む): 30472200

約数和(自身を除く): 8801215

約数列:

[1, 5, 7, 35, 49, 197, 245, 449, 985, 1379, 2245, 3143, 6895, 9653, 15715, 22001, 48265, 88453, 110005, 442265, 619171, 3095855, 4334197, 21670985]

約数ペア:

[(1, 21670985), (5, 4334197), (7, 3095855), (35, 619171), (49, 442265), (197, 110005), (245, 88453), (449, 48265), (985, 22001), (1379, 15715), (2245, 9653), (3143, 6895)]