81015280

素因数分解:

$2^4\times 5^1\times {\mathrm{1012691}}^1$

素因数の和:1012704

約数の個数: 20

約数和(自身を含む): 188360712

約数和(自身を除く): 107345432

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1012691, 2025382, 4050764, 5063455, 8101528, 10126910, 16203056, 20253820, 40507640, 81015280]

約数ペア:

[(1, 81015280), (2, 40507640), (4, 20253820), (5, 16203056), (8, 10126910), (10, 8101528), (16, 5063455), (20, 4050764), (40, 2025382), (80, 1012691)]