81531080

素因数分解:

$2^3\times 5^1\times {\mathrm{439}}^1\times {\mathrm{4643}}^1$

素因数の和:5093

約数の個数: 32

約数和(自身を含む): 183902400

約数和(自身を除く): 102371320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 439, 878, 1756, 2195, 3512, 4390, 4643, 8780, 9286, 17560, 18572, 23215, 37144, 46430, 92860, 185720, 2038277, 4076554, 8153108, 10191385, 16306216, 20382770, 40765540, 81531080]

約数ペア:

[(1, 81531080), (2, 40765540), (4, 20382770), (5, 16306216), (8, 10191385), (10, 8153108), (20, 4076554), (40, 2038277), (439, 185720), (878, 92860), (1756, 46430), (2195, 37144), (3512, 23215), (4390, 18572), (4643, 17560), (8780, 9286)]