81989920

素因数分解:

$2^5\times 5^1\times {\mathrm{419}}^1\times {\mathrm{1223}}^1$

素因数の和:1657

約数の個数: 48

約数和(自身を含む): 194322240

約数和(自身を除く): 112332320

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 419, 838, 1223, 1676, 2095, 2446, 3352, 4190, 4892, 6115, 6704, 8380, 9784, 12230, 13408, 16760, 19568, 24460, 33520, 39136, 48920, 67040, 97840, 195680, 512437, 1024874, 2049748, 2562185, 4099496, 5124370, 8198992, 10248740, 16397984, 20497480, 40994960, 81989920]

約数ペア:

[(1, 81989920), (2, 40994960), (4, 20497480), (5, 16397984), (8, 10248740), (10, 8198992), (16, 5124370), (20, 4099496), (32, 2562185), (40, 2049748), (80, 1024874), (160, 512437), (419, 195680), (838, 97840), (1223, 67040), (1676, 48920), (2095, 39136), (2446, 33520), (3352, 24460), (4190, 19568), (4892, 16760), (6115, 13408), (6704, 12230), (8380, 9784)]