129612880

素因数分解:

$2^4\times 5^1\times {\mathrm{1620161}}^1$

素因数の和:1620174

約数の個数: 20

約数和(自身を含む): 301350132

約数和(自身を除く): 171737252

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1620161, 3240322, 6480644, 8100805, 12961288, 16201610, 25922576, 32403220, 64806440, 129612880]

約数ペア:

[(1, 129612880), (2, 64806440), (4, 32403220), (5, 25922576), (8, 16201610), (10, 12961288), (16, 8100805), (20, 6480644), (40, 3240322), (80, 1620161)]