20651450

素因数分解:

$2^1\times 5^2\times {\mathrm{53}}^1\times {\mathrm{7793}}^1$

素因数の和:7858

約数の個数: 24

約数和(自身を含む): 39141468

約数和(自身を除く): 18490018

約数列:

[1, 2, 5, 10, 25, 50, 53, 106, 265, 530, 1325, 2650, 7793, 15586, 38965, 77930, 194825, 389650, 413029, 826058, 2065145, 4130290, 10325725, 20651450]

約数ペア:

[(1, 20651450), (2, 10325725), (5, 4130290), (10, 2065145), (25, 826058), (50, 413029), (53, 389650), (106, 194825), (265, 77930), (530, 38965), (1325, 15586), (2650, 7793)]