28375820

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{128981}}^1$

素因数の和:129001

約数の個数: 24

約数和(自身を含む): 65006928

約数和(自身を除く): 36631108

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 128981, 257962, 515924, 644905, 1289810, 1418791, 2579620, 2837582, 5675164, 7093955, 14187910, 28375820]

約数ペア:

[(1, 28375820), (2, 14187910), (4, 7093955), (5, 5675164), (10, 2837582), (11, 2579620), (20, 1418791), (22, 1289810), (44, 644905), (55, 515924), (110, 257962), (220, 128981)]