201990980

素因数分解:

$2^2\times 5^1\times {\mathrm{10099549}}^1$

素因数の和:10099558

約数の個数: 12

約数和(自身を含む): 424181100

約数和(自身を除く): 222190120

約数列:

[1, 2, 4, 5, 10, 20, 10099549, 20199098, 40398196, 50497745, 100995490, 201990980]

約数ペア:

[(1, 201990980), (2, 100995490), (4, 50497745), (5, 40398196), (10, 20199098), (20, 10099549)]