81477680

素因数分解:

$2^4\times 5^1\times {\mathrm{1018471}}^1$

素因数の和:1018484

約数の個数: 20

約数和(自身を含む): 189435792

約数和(自身を除く): 107958112

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1018471, 2036942, 4073884, 5092355, 8147768, 10184710, 16295536, 20369420, 40738840, 81477680]

約数ペア:

[(1, 81477680), (2, 40738840), (4, 20369420), (5, 16295536), (8, 10184710), (10, 8147768), (16, 5092355), (20, 4073884), (40, 2036942), (80, 1018471)]