21719980

素因数分解:

$2^2\times 5^1\times {\mathrm{137}}^1\times {\mathrm{7927}}^1$

素因数の和:8073

約数の個数: 24

約数和(自身を含む): 45950688

約数和(自身を除く): 24230708

約数列:

[1, 2, 4, 5, 10, 20, 137, 274, 548, 685, 1370, 2740, 7927, 15854, 31708, 39635, 79270, 158540, 1085999, 2171998, 4343996, 5429995, 10859990, 21719980]

約数ペア:

[(1, 21719980), (2, 10859990), (4, 5429995), (5, 4343996), (10, 2171998), (20, 1085999), (137, 158540), (274, 79270), (548, 39635), (685, 31708), (1370, 15854), (2740, 7927)]