66748820

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{81401}}^1$

素因数の和:81451

約数の個数: 24

約数和(自身を含む): 143593128

約数和(自身を除く): 76844308

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 81401, 162802, 325604, 407005, 814010, 1628020, 3337441, 6674882, 13349764, 16687205, 33374410, 66748820]

約数ペア:

[(1, 66748820), (2, 33374410), (4, 16687205), (5, 13349764), (10, 6674882), (20, 3337441), (41, 1628020), (82, 814010), (164, 407005), (205, 325604), (410, 162802), (820, 81401)]