81697540

素因数分解:

$2^2\times 5^1\times {\mathrm{103}}^1\times {\mathrm{39659}}^1$

素因数の和:39771

約数の個数: 24

約数和(自身を含む): 173234880

約数和(自身を除く): 91537340

約数列:

[1, 2, 4, 5, 10, 20, 103, 206, 412, 515, 1030, 2060, 39659, 79318, 158636, 198295, 396590, 793180, 4084877, 8169754, 16339508, 20424385, 40848770, 81697540]

約数ペア:

[(1, 81697540), (2, 40848770), (4, 20424385), (5, 16339508), (10, 8169754), (20, 4084877), (103, 793180), (206, 396590), (412, 198295), (515, 158636), (1030, 79318), (2060, 39659)]