129654320

素因数分解:

$2^4\times 5^1\times {\mathrm{1620679}}^1$

素因数の和:1620692

約数の個数: 20

約数和(自身を含む): 301446480

約数和(自身を除く): 171792160

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1620679, 3241358, 6482716, 8103395, 12965432, 16206790, 25930864, 32413580, 64827160, 129654320]

約数ペア:

[(1, 129654320), (2, 64827160), (4, 32413580), (5, 25930864), (8, 16206790), (10, 12965432), (16, 8103395), (20, 6482716), (40, 3241358), (80, 1620679)]