129424720

素因数分解:

$2^4\times 5^1\times {\mathrm{1617809}}^1$

素因数の和:1617822

約数の個数: 20

約数和(自身を含む): 300912660

約数和(自身を除く): 171487940

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1617809, 3235618, 6471236, 8089045, 12942472, 16178090, 25884944, 32356180, 64712360, 129424720]

約数ペア:

[(1, 129424720), (2, 64712360), (4, 32356180), (5, 25884944), (8, 16178090), (10, 12942472), (16, 8089045), (20, 6471236), (40, 3235618), (80, 1617809)]