19991780

素因数分解:

$2^2\times 5^1\times {\mathrm{73}}^1\times {\mathrm{13693}}^1$

素因数の和:13775

約数の個数: 24

約数和(自身を含む): 42560952

約数和(自身を除く): 22569172

約数列:

[1, 2, 4, 5, 10, 20, 73, 146, 292, 365, 730, 1460, 13693, 27386, 54772, 68465, 136930, 273860, 999589, 1999178, 3998356, 4997945, 9995890, 19991780]

約数ペア:

[(1, 19991780), (2, 9995890), (4, 4997945), (5, 3998356), (10, 1999178), (20, 999589), (73, 273860), (146, 136930), (292, 68465), (365, 54772), (730, 27386), (1460, 13693)]