21716840

素因数分解:

$2^3\times 5^1\times {\mathrm{542921}}^1$

素因数の和:542932

約数の個数: 16

約数和(自身を含む): 48862980

約数和(自身を除く): 27146140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 542921, 1085842, 2171684, 2714605, 4343368, 5429210, 10858420, 21716840]

約数ペア:

[(1, 21716840), (2, 10858420), (4, 5429210), (5, 4343368), (8, 2714605), (10, 2171684), (20, 1085842), (40, 542921)]