129400720

素因数分解:

$2^4\times 5^1\times {\mathrm{1617509}}^1$

素因数の和:1617522

約数の個数: 20

約数和(自身を含む): 300856860

約数和(自身を除く): 171456140

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1617509, 3235018, 6470036, 8087545, 12940072, 16175090, 25880144, 32350180, 64700360, 129400720]

約数ペア:

[(1, 129400720), (2, 64700360), (4, 32350180), (5, 25880144), (8, 16175090), (10, 12940072), (16, 8087545), (20, 6470036), (40, 3235018), (80, 1617509)]