20397465

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{463}}^1$

素因数の和:574

約数の個数: 48

約数和(自身を含む): 39087360

約数和(自身を除く): 18689895

約数列:

[1, 3, 5, 9, 11, 15, 33, 45, 55, 89, 99, 165, 267, 445, 463, 495, 801, 979, 1335, 1389, 2315, 2937, 4005, 4167, 4895, 5093, 6945, 8811, 14685, 15279, 20835, 25465, 41207, 44055, 45837, 76395, 123621, 206035, 229185, 370863, 453277, 618105, 1359831, 1854315, 2266385, 4079493, 6799155, 20397465]

約数ペア:

[(1, 20397465), (3, 6799155), (5, 4079493), (9, 2266385), (11, 1854315), (15, 1359831), (33, 618105), (45, 453277), (55, 370863), (89, 229185), (99, 206035), (165, 123621), (267, 76395), (445, 45837), (463, 44055), (495, 41207), (801, 25465), (979, 20835), (1335, 15279), (1389, 14685), (2315, 8811), (2937, 6945), (4005, 5093), (4167, 4895)]