20398760

素因数分解:

$2^3\times 5^1\times {\mathrm{113}}^1\times {\mathrm{4513}}^1$

素因数の和:4637

約数の個数: 32

約数和(自身を含む): 46313640

約数和(自身を除く): 25914880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 113, 226, 452, 565, 904, 1130, 2260, 4513, 4520, 9026, 18052, 22565, 36104, 45130, 90260, 180520, 509969, 1019938, 2039876, 2549845, 4079752, 5099690, 10199380, 20398760]

約数ペア:

[(1, 20398760), (2, 10199380), (4, 5099690), (5, 4079752), (8, 2549845), (10, 2039876), (20, 1019938), (40, 509969), (113, 180520), (226, 90260), (452, 45130), (565, 36104), (904, 22565), (1130, 18052), (2260, 9026), (4513, 4520)]