20655220

素因数分解:

$2^2\times 5^1\times {\mathrm{509}}^1\times {\mathrm{2029}}^1$

素因数の和:2547

約数の個数: 24

約数和(自身を含む): 43482600

約数和(自身を除く): 22827380

約数列:

[1, 2, 4, 5, 10, 20, 509, 1018, 2029, 2036, 2545, 4058, 5090, 8116, 10145, 10180, 20290, 40580, 1032761, 2065522, 4131044, 5163805, 10327610, 20655220]

約数ペア:

[(1, 20655220), (2, 10327610), (4, 5163805), (5, 4131044), (10, 2065522), (20, 1032761), (509, 40580), (1018, 20290), (2029, 10180), (2036, 10145), (2545, 8116), (4058, 5090)]