19812040

素因数分解:

$2^3\times 5^1\times {\mathrm{495301}}^1$

素因数の和:495312

約数の個数: 16

約数和(自身を含む): 44577180

約数和(自身を除く): 24765140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 495301, 990602, 1981204, 2476505, 3962408, 4953010, 9906020, 19812040]

約数ペア:

[(1, 19812040), (2, 9906020), (4, 4953010), (5, 3962408), (8, 2476505), (10, 1981204), (20, 990602), (40, 495301)]