18231225

素因数分解:

$3^1\times 5^2\times {\mathrm{17}}^1\times {\mathrm{79}}^1\times {\mathrm{181}}^1$

素因数の和:290

約数の個数: 48

約数和(自身を含む): 32497920

約数和(自身を除く): 14266695

約数列:

[1, 3, 5, 15, 17, 25, 51, 75, 79, 85, 181, 237, 255, 395, 425, 543, 905, 1185, 1275, 1343, 1975, 2715, 3077, 4029, 4525, 5925, 6715, 9231, 13575, 14299, 15385, 20145, 33575, 42897, 46155, 71495, 76925, 100725, 214485, 230775, 243083, 357475, 729249, 1072425, 1215415, 3646245, 6077075, 18231225]

約数ペア:

[(1, 18231225), (3, 6077075), (5, 3646245), (15, 1215415), (17, 1072425), (25, 729249), (51, 357475), (75, 243083), (79, 230775), (85, 214485), (181, 100725), (237, 76925), (255, 71495), (395, 46155), (425, 42897), (543, 33575), (905, 20145), (1185, 15385), (1275, 14299), (1343, 13575), (1975, 9231), (2715, 6715), (3077, 5925), (4029, 4525)]