19131775

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{37}}^2\times {\mathrm{43}}^1$

素因数の和:140

約数の個数: 36

約数和(自身を含む): 26868072

約数和(自身を除く): 7736297

約数列:

[1, 5, 13, 25, 37, 43, 65, 185, 215, 325, 481, 559, 925, 1075, 1369, 1591, 2405, 2795, 6845, 7955, 12025, 13975, 17797, 20683, 34225, 39775, 58867, 88985, 103415, 294335, 444925, 517075, 765271, 1471675, 3826355, 19131775]

約数ペア:

[(1, 19131775), (5, 3826355), (13, 1471675), (25, 765271), (37, 517075), (43, 444925), (65, 294335), (185, 103415), (215, 88985), (325, 58867), (481, 39775), (559, 34225), (925, 20683), (1075, 17797), (1369, 13975), (1591, 12025), (2405, 7955), (2795, 6845)]