18201580

素因数分解:

$2^2\times 5^1\times {\mathrm{659}}^1\times {\mathrm{1381}}^1$

素因数の和:2049

約数の個数: 24

約数和(自身を含む): 38309040

約数和(自身を除く): 20107460

約数列:

[1, 2, 4, 5, 10, 20, 659, 1318, 1381, 2636, 2762, 3295, 5524, 6590, 6905, 13180, 13810, 27620, 910079, 1820158, 3640316, 4550395, 9100790, 18201580]

約数ペア:

[(1, 18201580), (2, 9100790), (4, 4550395), (5, 3640316), (10, 1820158), (20, 910079), (659, 27620), (1318, 13810), (1381, 13180), (2636, 6905), (2762, 6590), (3295, 5524)]