21310775

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{1223}}^1$

素因数の和:1291

約数の個数: 24

約数和(自身を含む): 28685664

約数和(自身を除く): 7374889

約数列:

[1, 5, 17, 25, 41, 85, 205, 425, 697, 1025, 1223, 3485, 6115, 17425, 20791, 30575, 50143, 103955, 250715, 519775, 852431, 1253575, 4262155, 21310775]

約数ペア:

[(1, 21310775), (5, 4262155), (17, 1253575), (25, 852431), (41, 519775), (85, 250715), (205, 103955), (425, 50143), (697, 30575), (1025, 20791), (1223, 17425), (3485, 6115)]