155778940

素因数分解:

$2^2\times 5^1\times {\mathrm{389}}^1\times {\mathrm{20023}}^1$

素因数の和:20421

約数の個数: 24

約数和(自身を含む): 327993120

約数和(自身を除く): 172214180

約数列:

[1, 2, 4, 5, 10, 20, 389, 778, 1556, 1945, 3890, 7780, 20023, 40046, 80092, 100115, 200230, 400460, 7788947, 15577894, 31155788, 38944735, 77889470, 155778940]

約数ペア:

[(1, 155778940), (2, 77889470), (4, 38944735), (5, 31155788), (10, 15577894), (20, 7788947), (389, 400460), (778, 200230), (1556, 100115), (1945, 80092), (3890, 40046), (7780, 20023)]