21712820

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{57139}}^1$

素因数の和:57167

約数の個数: 24

約数和(自身を含む): 47997600

約数和(自身を除く): 26284780

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 380, 57139, 114278, 228556, 285695, 571390, 1085641, 1142780, 2171282, 4342564, 5428205, 10856410, 21712820]

約数ペア:

[(1, 21712820), (2, 10856410), (4, 5428205), (5, 4342564), (10, 2171282), (19, 1142780), (20, 1085641), (38, 571390), (76, 285695), (95, 228556), (190, 114278), (380, 57139)]