20843440

素因数分解:

$2^4\times 5^1\times {\mathrm{260543}}^1$

素因数の和:260556

約数の個数: 20

約数和(自身を含む): 48461184

約数和(自身を除く): 27617744

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 260543, 521086, 1042172, 1302715, 2084344, 2605430, 4168688, 5210860, 10421720, 20843440]

約数ペア:

[(1, 20843440), (2, 10421720), (4, 5210860), (5, 4168688), (8, 2605430), (10, 2084344), (16, 1302715), (20, 1042172), (40, 521086), (80, 260543)]