20398635

素因数分解:

$3^5\times 5^1\times {\mathrm{103}}^1\times {\mathrm{163}}^1$

素因数の和:286

約数の個数: 48

約数和(自身を含む): 37250304

約数和(自身を除く): 16851669

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 103, 135, 163, 243, 309, 405, 489, 515, 815, 927, 1215, 1467, 1545, 2445, 2781, 4401, 4635, 7335, 8343, 13203, 13905, 16789, 22005, 25029, 39609, 41715, 50367, 66015, 83945, 125145, 151101, 198045, 251835, 453303, 755505, 1359909, 2266515, 4079727, 6799545, 20398635]

約数ペア:

[(1, 20398635), (3, 6799545), (5, 4079727), (9, 2266515), (15, 1359909), (27, 755505), (45, 453303), (81, 251835), (103, 198045), (135, 151101), (163, 125145), (243, 83945), (309, 66015), (405, 50367), (489, 41715), (515, 39609), (815, 25029), (927, 22005), (1215, 16789), (1467, 13905), (1545, 13203), (2445, 8343), (2781, 7335), (4401, 4635)]