21004775

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{4493}}^1$

素因数の和:4531

約数の個数: 24

約数和(自身を含む): 30091824

約数和(自身を除く): 9087049

約数列:

[1, 5, 11, 17, 25, 55, 85, 187, 275, 425, 935, 4493, 4675, 22465, 49423, 76381, 112325, 247115, 381905, 840191, 1235575, 1909525, 4200955, 21004775]

約数ペア:

[(1, 21004775), (5, 4200955), (11, 1909525), (17, 1235575), (25, 840191), (55, 381905), (85, 247115), (187, 112325), (275, 76381), (425, 49423), (935, 22465), (4493, 4675)]