28878760

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{17609}}^1$

素因数の和:17661

約数の個数: 32

約数和(自身を含む): 66565800

約数和(自身を除く): 37687040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 17609, 35218, 70436, 88045, 140872, 176090, 352180, 704360, 721969, 1443938, 2887876, 3609845, 5775752, 7219690, 14439380, 28878760]

約数ペア:

[(1, 28878760), (2, 14439380), (4, 7219690), (5, 5775752), (8, 3609845), (10, 2887876), (20, 1443938), (40, 721969), (41, 704360), (82, 352180), (164, 176090), (205, 140872), (328, 88045), (410, 70436), (820, 35218), (1640, 17609)]