21082685

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{397}}^1$

素因数の和:477

約数の個数: 32

約数和(自身を含む): 29420160

約数和(自身を除く): 8337475

約数列:

[1, 5, 13, 19, 43, 65, 95, 215, 247, 397, 559, 817, 1235, 1985, 2795, 4085, 5161, 7543, 10621, 17071, 25805, 37715, 53105, 85355, 98059, 221923, 324349, 490295, 1109615, 1621745, 4216537, 21082685]

約数ペア:

[(1, 21082685), (5, 4216537), (13, 1621745), (19, 1109615), (43, 490295), (65, 324349), (95, 221923), (215, 98059), (247, 85355), (397, 53105), (559, 37715), (817, 25805), (1235, 17071), (1985, 10621), (2795, 7543), (4085, 5161)]