51781720

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{18233}}^1$

素因数の和:18315

約数の個数: 32

約数和(自身を含む): 118156320

約数和(自身を除く): 66374600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 142, 284, 355, 568, 710, 1420, 2840, 18233, 36466, 72932, 91165, 145864, 182330, 364660, 729320, 1294543, 2589086, 5178172, 6472715, 10356344, 12945430, 25890860, 51781720]

約数ペア:

[(1, 51781720), (2, 25890860), (4, 12945430), (5, 10356344), (8, 6472715), (10, 5178172), (20, 2589086), (40, 1294543), (71, 729320), (142, 364660), (284, 182330), (355, 145864), (568, 91165), (710, 72932), (1420, 36466), (2840, 18233)]