81251680

素因数分解:

$2^5\times 5^1\times {\mathrm{179}}^1\times {\mathrm{2837}}^1$

素因数の和:3031

約数の個数: 48

約数和(自身を含む): 193097520

約数和(自身を除く): 111845840

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 179, 358, 716, 895, 1432, 1790, 2837, 2864, 3580, 5674, 5728, 7160, 11348, 14185, 14320, 22696, 28370, 28640, 45392, 56740, 90784, 113480, 226960, 453920, 507823, 1015646, 2031292, 2539115, 4062584, 5078230, 8125168, 10156460, 16250336, 20312920, 40625840, 81251680]

約数ペア:

[(1, 81251680), (2, 40625840), (4, 20312920), (5, 16250336), (8, 10156460), (10, 8125168), (16, 5078230), (20, 4062584), (32, 2539115), (40, 2031292), (80, 1015646), (160, 507823), (179, 453920), (358, 226960), (716, 113480), (895, 90784), (1432, 56740), (1790, 45392), (2837, 28640), (2864, 28370), (3580, 22696), (5674, 14320), (5728, 14185), (7160, 11348)]