21729290

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{197539}}^1$

素因数の和:197557

約数の個数: 16

約数和(自身を含む): 42668640

約数和(自身を除く): 20939350

約数列:

[1, 2, 5, 10, 11, 22, 55, 110, 197539, 395078, 987695, 1975390, 2172929, 4345858, 10864645, 21729290]

約数ペア:

[(1, 21729290), (2, 10864645), (5, 4345858), (10, 2172929), (11, 1975390), (22, 987695), (55, 395078), (110, 197539)]