81392420

素因数分解:

$2^2\times 5^1\times {\mathrm{163}}^1\times {\mathrm{24967}}^1$

素因数の和:25139

約数の個数: 24

約数和(自身を含む): 171979584

約数和(自身を除く): 90587164

約数列:

[1, 2, 4, 5, 10, 20, 163, 326, 652, 815, 1630, 3260, 24967, 49934, 99868, 124835, 249670, 499340, 4069621, 8139242, 16278484, 20348105, 40696210, 81392420]

約数ペア:

[(1, 81392420), (2, 40696210), (4, 20348105), (5, 16278484), (10, 8139242), (20, 4069621), (163, 499340), (326, 249670), (652, 124835), (815, 99868), (1630, 49934), (3260, 24967)]