81651560

素因数分解:

$2^3\times 5^1\times {\mathrm{67}}^1\times {\mathrm{30467}}^1$

素因数の和:30545

約数の個数: 32

約数和(自身を含む): 186464160

約数和(自身を除く): 104812600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 67, 134, 268, 335, 536, 670, 1340, 2680, 30467, 60934, 121868, 152335, 243736, 304670, 609340, 1218680, 2041289, 4082578, 8165156, 10206445, 16330312, 20412890, 40825780, 81651560]

約数ペア:

[(1, 81651560), (2, 40825780), (4, 20412890), (5, 16330312), (8, 10206445), (10, 8165156), (20, 4082578), (40, 2041289), (67, 1218680), (134, 609340), (268, 304670), (335, 243736), (536, 152335), (670, 121868), (1340, 60934), (2680, 30467)]