257342020

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{989777}}^1$

素因数の和:989799

約数の個数: 24

約数和(自身を含む): 581989464

約数和(自身を除く): 324647444

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 989777, 1979554, 3959108, 4948885, 9897770, 12867101, 19795540, 25734202, 51468404, 64335505, 128671010, 257342020]

約数ペア:

[(1, 257342020), (2, 128671010), (4, 64335505), (5, 51468404), (10, 25734202), (13, 19795540), (20, 12867101), (26, 9897770), (52, 4948885), (65, 3959108), (130, 1979554), (260, 989777)]