21719120

素因数分解:

$2^4\times 5^1\times {\mathrm{271489}}^1$

素因数の和:271502

約数の個数: 20

約数和(自身を含む): 50497140

約数和(自身を除く): 28778020

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 271489, 542978, 1085956, 1357445, 2171912, 2714890, 4343824, 5429780, 10859560, 21719120]

約数ペア:

[(1, 21719120), (2, 10859560), (4, 5429780), (5, 4343824), (8, 2714890), (10, 2171912), (16, 1357445), (20, 1085956), (40, 542978), (80, 271489)]