18915507

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{67}}^1\times {\mathrm{127}}^1$

素因数の和:232

約数の個数: 48

約数和(自身を含む): 31682560

約数和(自身を除く): 12767053

約数列:

[1, 3, 9, 13, 19, 39, 57, 67, 117, 127, 171, 201, 247, 381, 603, 741, 871, 1143, 1273, 1651, 2223, 2413, 2613, 3819, 4953, 7239, 7839, 8509, 11457, 14859, 16549, 21717, 25527, 31369, 49647, 76581, 94107, 110617, 148941, 161671, 282321, 331851, 485013, 995553, 1455039, 2101723, 6305169, 18915507]

約数ペア:

[(1, 18915507), (3, 6305169), (9, 2101723), (13, 1455039), (19, 995553), (39, 485013), (57, 331851), (67, 282321), (117, 161671), (127, 148941), (171, 110617), (201, 94107), (247, 76581), (381, 49647), (603, 31369), (741, 25527), (871, 21717), (1143, 16549), (1273, 14859), (1651, 11457), (2223, 8509), (2413, 7839), (2613, 7239), (3819, 4953)]