20721584

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{99623}}^1$

素因数の和:99644

約数の個数: 20

約数和(自身を含む): 43236816

約数和(自身を除く): 22515232

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 99623, 199246, 398492, 796984, 1295099, 1593968, 2590198, 5180396, 10360792, 20721584]

約数ペア:

[(1, 20721584), (2, 10360792), (4, 5180396), (8, 2590198), (13, 1593968), (16, 1295099), (26, 796984), (52, 398492), (104, 199246), (208, 99623)]