21228440

素因数分解:

$2^3\times 5^1\times {\mathrm{530711}}^1$

素因数の和:530722

約数の個数: 16

約数和(自身を含む): 47764080

約数和(自身を除く): 26535640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 530711, 1061422, 2122844, 2653555, 4245688, 5307110, 10614220, 21228440]

約数ペア:

[(1, 21228440), (2, 10614220), (4, 5307110), (5, 4245688), (8, 2653555), (10, 2122844), (20, 1061422), (40, 530711)]