19813005

素因数分解:

$3^5\times 5^1\times {\mathrm{23}}^1\times {\mathrm{709}}^1$

素因数の和:752

約数の個数: 48

約数和(自身を含む): 37215360

約数和(自身を除く): 17402355

約数列:

[1, 3, 5, 9, 15, 23, 27, 45, 69, 81, 115, 135, 207, 243, 345, 405, 621, 709, 1035, 1215, 1863, 2127, 3105, 3545, 5589, 6381, 9315, 10635, 16307, 19143, 27945, 31905, 48921, 57429, 81535, 95715, 146763, 172287, 244605, 287145, 440289, 733815, 861435, 1320867, 2201445, 3962601, 6604335, 19813005]

約数ペア:

[(1, 19813005), (3, 6604335), (5, 3962601), (9, 2201445), (15, 1320867), (23, 861435), (27, 733815), (45, 440289), (69, 287145), (81, 244605), (115, 172287), (135, 146763), (207, 95715), (243, 81535), (345, 57429), (405, 48921), (621, 31905), (709, 27945), (1035, 19143), (1215, 16307), (1863, 10635), (2127, 9315), (3105, 6381), (3545, 5589)]