19810825

素因数分解:

$5^2\times {\mathrm{19}}^1\times {\mathrm{179}}^1\times {\mathrm{233}}^1$

素因数の和:441

約数の個数: 24

約数和(自身を含む): 26114400

約数和(自身を除く): 6303575

約数列:

[1, 5, 19, 25, 95, 179, 233, 475, 895, 1165, 3401, 4427, 4475, 5825, 17005, 22135, 41707, 85025, 110675, 208535, 792433, 1042675, 3962165, 19810825]

約数ペア:

[(1, 19810825), (5, 3962165), (19, 1042675), (25, 792433), (95, 208535), (179, 110675), (233, 85025), (475, 41707), (895, 22135), (1165, 17005), (3401, 5825), (4427, 4475)]