991880

素因数分解:

$2^3\times 5^1\times {\mathrm{137}}^1\times {\mathrm{181}}^1$

素因数の和:329

約数の個数: 32

約数和(自身を含む): 2260440

約数和(自身を除く): 1268560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 137, 181, 274, 362, 548, 685, 724, 905, 1096, 1370, 1448, 1810, 2740, 3620, 5480, 7240, 24797, 49594, 99188, 123985, 198376, 247970, 495940, 991880]

約数ペア:

[(1, 991880), (2, 495940), (4, 247970), (5, 198376), (8, 123985), (10, 99188), (20, 49594), (40, 24797), (137, 7240), (181, 5480), (274, 3620), (362, 2740), (548, 1810), (685, 1448), (724, 1370), (905, 1096)]