81615140

素因数分解:

$2^2\times 5^1\times {\mathrm{103}}^1\times {\mathrm{39619}}^1$

素因数の和:39731

約数の個数: 24

約数和(自身を含む): 173060160

約数和(自身を除く): 91445020

約数列:

[1, 2, 4, 5, 10, 20, 103, 206, 412, 515, 1030, 2060, 39619, 79238, 158476, 198095, 396190, 792380, 4080757, 8161514, 16323028, 20403785, 40807570, 81615140]

約数ペア:

[(1, 81615140), (2, 40807570), (4, 20403785), (5, 16323028), (10, 8161514), (20, 4080757), (103, 792380), (206, 396190), (412, 198095), (515, 158476), (1030, 79238), (2060, 39619)]