81642320

素因数分解:

$2^4\times 5^1\times {\mathrm{1020529}}^1$

素因数の和:1020542

約数の個数: 20

約数和(自身を含む): 189818580

約数和(自身を除く): 108176260

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1020529, 2041058, 4082116, 5102645, 8164232, 10205290, 16328464, 20410580, 40821160, 81642320]

約数ペア:

[(1, 81642320), (2, 40821160), (4, 20410580), (5, 16328464), (8, 10205290), (10, 8164232), (16, 5102645), (20, 4082116), (40, 2041058), (80, 1020529)]