645160

素因数分解:

$2^3\times 5^1\times {\mathrm{127}}^2$

素因数の和:265

約数の個数: 24

約数和(自身を含む): 1463130

約数和(自身を除く): 817970

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 127, 254, 508, 635, 1016, 1270, 2540, 5080, 16129, 32258, 64516, 80645, 129032, 161290, 322580, 645160]

約数ペア:

[(1, 645160), (2, 322580), (4, 161290), (5, 129032), (8, 80645), (10, 64516), (20, 32258), (40, 16129), (127, 5080), (254, 2540), (508, 1270), (635, 1016)]