257380

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{757}}^1$

素因数の和:783

約数の個数: 24

約数和(自身を含む): 573048

約数和(自身を除く): 315668

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340, 757, 1514, 3028, 3785, 7570, 12869, 15140, 25738, 51476, 64345, 128690, 257380]

約数ペア:

[(1, 257380), (2, 128690), (4, 64345), (5, 51476), (10, 25738), (17, 15140), (20, 12869), (34, 7570), (68, 3785), (85, 3028), (170, 1514), (340, 757)]