19943480

素因数分解:

$2^3\times 5^1\times {\mathrm{457}}^1\times {\mathrm{1091}}^1$

素因数の和:1559

約数の個数: 32

約数和(自身を含む): 45012240

約数和(自身を除く): 25068760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 457, 914, 1091, 1828, 2182, 2285, 3656, 4364, 4570, 5455, 8728, 9140, 10910, 18280, 21820, 43640, 498587, 997174, 1994348, 2492935, 3988696, 4985870, 9971740, 19943480]

約数ペア:

[(1, 19943480), (2, 9971740), (4, 4985870), (5, 3988696), (8, 2492935), (10, 1994348), (20, 997174), (40, 498587), (457, 43640), (914, 21820), (1091, 18280), (1828, 10910), (2182, 9140), (2285, 8728), (3656, 5455), (4364, 4570)]