21310795

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{431}}^1$

素因数の和:507

約数の個数: 32

約数和(自身を含む): 29859840

約数和(自身を除く): 8549045

約数列:

[1, 5, 11, 29, 31, 55, 145, 155, 319, 341, 431, 899, 1595, 1705, 2155, 4495, 4741, 9889, 12499, 13361, 23705, 49445, 62495, 66805, 137489, 146971, 387469, 687445, 734855, 1937345, 4262159, 21310795]

約数ペア:

[(1, 21310795), (5, 4262159), (11, 1937345), (29, 734855), (31, 687445), (55, 387469), (145, 146971), (155, 137489), (319, 66805), (341, 62495), (431, 49445), (899, 23705), (1595, 13361), (1705, 12499), (2155, 9889), (4495, 4741)]