21870130

素因数分解:

$2^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{30803}}^1$

素因数の和:30881

約数の個数: 16

約数和(自身を含む): 39921984

約数和(自身を除く): 18051854

約数列:

[1, 2, 5, 10, 71, 142, 355, 710, 30803, 61606, 154015, 308030, 2187013, 4374026, 10935065, 21870130]

約数ペア:

[(1, 21870130), (2, 10935065), (5, 4374026), (10, 2187013), (71, 308030), (142, 154015), (355, 61606), (710, 30803)]