21557789155

素因数分解:

$5^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{107}}^1\times {\mathrm{122477}}^1$

素因数の和:122643

約数の個数: 32

約数和(自身を含む): 30476445696

約数和(自身を除く): 8918656541

約数列:

[1, 5, 7, 35, 47, 107, 235, 329, 535, 749, 1645, 3745, 5029, 25145, 35203, 122477, 176015, 612385, 857339, 4286695, 5756419, 13105039, 28782095, 40294933, 65525195, 91735273, 201474665, 458676365, 615936833, 3079684165, 4311557831, 21557789155]

約数ペア:

[(1, 21557789155), (5, 4311557831), (7, 3079684165), (35, 615936833), (47, 458676365), (107, 201474665), (235, 91735273), (329, 65525195), (535, 40294933), (749, 28782095), (1645, 13105039), (3745, 5756419), (5029, 4286695), (25145, 857339), (35203, 612385), (122477, 176015)]