81616340

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{313909}}^1$

素因数の和:313931

約数の個数: 24

約数和(自身を含む): 184579080

約数和(自身を除く): 102962740

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 313909, 627818, 1255636, 1569545, 3139090, 4080817, 6278180, 8161634, 16323268, 20404085, 40808170, 81616340]

約数ペア:

[(1, 81616340), (2, 40808170), (4, 20404085), (5, 16323268), (10, 8161634), (13, 6278180), (20, 4080817), (26, 3139090), (52, 1569545), (65, 1255636), (130, 627818), (260, 313909)]