19951640

素因数分解:

$2^3\times 5^1\times {\mathrm{498791}}^1$

素因数の和:498802

約数の個数: 16

約数和(自身を含む): 44891280

約数和(自身を除く): 24939640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 498791, 997582, 1995164, 2493955, 3990328, 4987910, 9975820, 19951640]

約数ペア:

[(1, 19951640), (2, 9975820), (4, 4987910), (5, 3990328), (8, 2493955), (10, 1995164), (20, 997582), (40, 498791)]