20866405

素因数分解:

$5^1\times 7^3\times {\mathrm{23}}^3$

素因数の和:95

約数の個数: 32

約数和(自身を含む): 30528000

約数和(自身を除く): 9661595

約数列:

[1, 5, 7, 23, 35, 49, 115, 161, 245, 343, 529, 805, 1127, 1715, 2645, 3703, 5635, 7889, 12167, 18515, 25921, 39445, 60835, 85169, 129605, 181447, 425845, 596183, 907235, 2980915, 4173281, 20866405]

約数ペア:

[(1, 20866405), (5, 4173281), (7, 2980915), (23, 907235), (35, 596183), (49, 425845), (115, 181447), (161, 129605), (245, 85169), (343, 60835), (529, 39445), (805, 25921), (1127, 18515), (1715, 12167), (2645, 7889), (3703, 5635)]