20012840

素因数分解:

$2^3\times 5^1\times {\mathrm{500321}}^1$

素因数の和:500332

約数の個数: 16

約数和(自身を含む): 45028980

約数和(自身を除く): 25016140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 500321, 1000642, 2001284, 2501605, 4002568, 5003210, 10006420, 20012840]

約数ペア:

[(1, 20012840), (2, 10006420), (4, 5003210), (5, 4002568), (8, 2501605), (10, 2001284), (20, 1000642), (40, 500321)]