257958460

素因数分解:

$2^2\times 5^1\times {\mathrm{1637}}^1\times {\mathrm{7879}}^1$

素因数の和:9525

約数の個数: 24

約数和(自身を含む): 542112480

約数和(自身を除く): 284154020

約数列:

[1, 2, 4, 5, 10, 20, 1637, 3274, 6548, 7879, 8185, 15758, 16370, 31516, 32740, 39395, 78790, 157580, 12897923, 25795846, 51591692, 64489615, 128979230, 257958460]

約数ペア:

[(1, 257958460), (2, 128979230), (4, 64489615), (5, 51591692), (10, 25795846), (20, 12897923), (1637, 157580), (3274, 78790), (6548, 39395), (7879, 32740), (8185, 31516), (15758, 16370)]