20425880

素因数分解:

$2^3\times 5^1\times {\mathrm{113}}^1\times {\mathrm{4519}}^1$

素因数の和:4643

約数の個数: 32

約数和(自身を含む): 46375200

約数和(自身を除く): 25949320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 113, 226, 452, 565, 904, 1130, 2260, 4519, 4520, 9038, 18076, 22595, 36152, 45190, 90380, 180760, 510647, 1021294, 2042588, 2553235, 4085176, 5106470, 10212940, 20425880]

約数ペア:

[(1, 20425880), (2, 10212940), (4, 5106470), (5, 4085176), (8, 2553235), (10, 2042588), (20, 1021294), (40, 510647), (113, 180760), (226, 90380), (452, 45190), (565, 36152), (904, 22595), (1130, 18076), (2260, 9038), (4519, 4520)]