21319016

素因数分解:

$2^3\times {\mathrm{41}}^1\times {\mathrm{64997}}^1$

素因数の和:65044

約数の個数: 16

約数和(自身を含む): 40948740

約数和(自身を除く): 19629724

約数列:

[1, 2, 4, 8, 41, 82, 164, 328, 64997, 129994, 259988, 519976, 2664877, 5329754, 10659508, 21319016]

約数ペア:

[(1, 21319016), (2, 10659508), (4, 5329754), (8, 2664877), (41, 519976), (82, 259988), (164, 129994), (328, 64997)]