19735480

素因数分解:

$2^3\times 5^1\times {\mathrm{521}}^1\times {\mathrm{947}}^1$

素因数の和:1479

約数の個数: 32

約数和(自身を含む): 44537040

約数和(自身を除く): 24801560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 521, 947, 1042, 1894, 2084, 2605, 3788, 4168, 4735, 5210, 7576, 9470, 10420, 18940, 20840, 37880, 493387, 986774, 1973548, 2466935, 3947096, 4933870, 9867740, 19735480]

約数ペア:

[(1, 19735480), (2, 9867740), (4, 4933870), (5, 3947096), (8, 2466935), (10, 1973548), (20, 986774), (40, 493387), (521, 37880), (947, 20840), (1042, 18940), (1894, 10420), (2084, 9470), (2605, 7576), (3788, 5210), (4168, 4735)]