81931420

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{251}}^1\times {\mathrm{859}}^1$

素因数の和:1138

約数の個数: 48

約数和(自身を含む): 182044800

約数和(自身を除く): 100113380

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 251, 380, 502, 859, 1004, 1255, 1718, 2510, 3436, 4295, 4769, 5020, 8590, 9538, 16321, 17180, 19076, 23845, 32642, 47690, 65284, 81605, 95380, 163210, 215609, 326420, 431218, 862436, 1078045, 2156090, 4096571, 4312180, 8193142, 16386284, 20482855, 40965710, 81931420]

約数ペア:

[(1, 81931420), (2, 40965710), (4, 20482855), (5, 16386284), (10, 8193142), (19, 4312180), (20, 4096571), (38, 2156090), (76, 1078045), (95, 862436), (190, 431218), (251, 326420), (380, 215609), (502, 163210), (859, 95380), (1004, 81605), (1255, 65284), (1718, 47690), (2510, 32642), (3436, 23845), (4295, 19076), (4769, 17180), (5020, 16321), (8590, 9538)]