127999700

素因数分解:

$2^2\times 5^2\times {\mathrm{1279997}}^1$

素因数の和:1280011

約数の個数: 18

約数和(自身を含む): 277759566

約数和(自身を除く): 149759866

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 1279997, 2559994, 5119988, 6399985, 12799970, 25599940, 31999925, 63999850, 127999700]

約数ペア:

[(1, 127999700), (2, 63999850), (4, 31999925), (5, 25599940), (10, 12799970), (20, 6399985), (25, 5119988), (50, 2559994), (100, 1279997)]