20631664

素因数分解:

$2^4\times {\mathrm{61}}^1\times {\mathrm{21139}}^1$

素因数の和:21208

約数の個数: 20

約数和(自身を含む): 40631080

約数和(自身を除く): 19999416

約数列:

[1, 2, 4, 8, 16, 61, 122, 244, 488, 976, 21139, 42278, 84556, 169112, 338224, 1289479, 2578958, 5157916, 10315832, 20631664]

約数ペア:

[(1, 20631664), (2, 10315832), (4, 5157916), (8, 2578958), (16, 1289479), (61, 338224), (122, 169112), (244, 84556), (488, 42278), (976, 21139)]