81309740

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{213973}}^1$

素因数の和:214001

約数の個数: 24

約数和(自身を含む): 179738160

約数和(自身を除く): 98428420

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 380, 213973, 427946, 855892, 1069865, 2139730, 4065487, 4279460, 8130974, 16261948, 20327435, 40654870, 81309740]

約数ペア:

[(1, 81309740), (2, 40654870), (4, 20327435), (5, 16261948), (10, 8130974), (19, 4279460), (20, 4065487), (38, 2139730), (76, 1069865), (95, 855892), (190, 427946), (380, 213973)]