21905240

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{78233}}^1$

素因数の和:78251

約数の個数: 32

約数和(自身を含む): 56328480

約数和(自身を除く): 34423240

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 78233, 156466, 312932, 391165, 547631, 625864, 782330, 1095262, 1564660, 2190524, 2738155, 3129320, 4381048, 5476310, 10952620, 21905240]

約数ペア:

[(1, 21905240), (2, 10952620), (4, 5476310), (5, 4381048), (7, 3129320), (8, 2738155), (10, 2190524), (14, 1564660), (20, 1095262), (28, 782330), (35, 625864), (40, 547631), (56, 391165), (70, 312932), (140, 156466), (280, 78233)]