21239216

素因数分解:

$2^4\times {\mathrm{31}}^1\times {\mathrm{42821}}^1$

素因数の和:42860

約数の個数: 20

約数和(自身を含む): 42479424

約数和(自身を除く): 21240208

約数列:

[1, 2, 4, 8, 16, 31, 62, 124, 248, 496, 42821, 85642, 171284, 342568, 685136, 1327451, 2654902, 5309804, 10619608, 21239216]

約数ペア:

[(1, 21239216), (2, 10619608), (4, 5309804), (8, 2654902), (16, 1327451), (31, 685136), (62, 342568), (124, 171284), (248, 85642), (496, 42821)]