21738040

素因数分解:

$2^3\times 5^1\times {\mathrm{223}}^1\times {\mathrm{2437}}^1$

素因数の和:2671

約数の個数: 32

約数和(自身を含む): 49150080

約数和(自身を除く): 27412040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 223, 446, 892, 1115, 1784, 2230, 2437, 4460, 4874, 8920, 9748, 12185, 19496, 24370, 48740, 97480, 543451, 1086902, 2173804, 2717255, 4347608, 5434510, 10869020, 21738040]

約数ペア:

[(1, 21738040), (2, 10869020), (4, 5434510), (5, 4347608), (8, 2717255), (10, 2173804), (20, 1086902), (40, 543451), (223, 97480), (446, 48740), (892, 24370), (1115, 19496), (1784, 12185), (2230, 9748), (2437, 8920), (4460, 4874)]