19720760

素因数分解:

$2^3\times 5^1\times {\mathrm{113}}^1\times {\mathrm{4363}}^1$

素因数の和:4487

約数の個数: 32

約数和(自身を含む): 44774640

約数和(自身を除く): 25053880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 113, 226, 452, 565, 904, 1130, 2260, 4363, 4520, 8726, 17452, 21815, 34904, 43630, 87260, 174520, 493019, 986038, 1972076, 2465095, 3944152, 4930190, 9860380, 19720760]

約数ペア:

[(1, 19720760), (2, 9860380), (4, 4930190), (5, 3944152), (8, 2465095), (10, 1972076), (20, 986038), (40, 493019), (113, 174520), (226, 87260), (452, 43630), (565, 34904), (904, 21815), (1130, 17452), (2260, 8726), (4363, 4520)]