21381495

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{191}}^1\times {\mathrm{439}}^1$

素因数の和:655

約数の個数: 32

約数和(自身を含む): 36495360

約数和(自身を除く): 15113865

約数列:

[1, 3, 5, 15, 17, 51, 85, 191, 255, 439, 573, 955, 1317, 2195, 2865, 3247, 6585, 7463, 9741, 16235, 22389, 37315, 48705, 83849, 111945, 251547, 419245, 1257735, 1425433, 4276299, 7127165, 21381495]

約数ペア:

[(1, 21381495), (3, 7127165), (5, 4276299), (15, 1425433), (17, 1257735), (51, 419245), (85, 251547), (191, 111945), (255, 83849), (439, 48705), (573, 37315), (955, 22389), (1317, 16235), (2195, 9741), (2865, 7463), (3247, 6585)]