81878180

素因数分解:

$2^2\times 5^1\times {\mathrm{179}}^1\times {\mathrm{22871}}^1$

素因数の和:23059

約数の個数: 24

約数和(自身を含む): 172912320

約数和(自身を除く): 91034140

約数列:

[1, 2, 4, 5, 10, 20, 179, 358, 716, 895, 1790, 3580, 22871, 45742, 91484, 114355, 228710, 457420, 4093909, 8187818, 16375636, 20469545, 40939090, 81878180]

約数ペア:

[(1, 81878180), (2, 40939090), (4, 20469545), (5, 16375636), (10, 8187818), (20, 4093909), (179, 457420), (358, 228710), (716, 114355), (895, 91484), (1790, 45742), (3580, 22871)]