20199825

素因数分解:

$3^2\times 5^2\times {\mathrm{17}}^1\times {\mathrm{5281}}^1$

素因数の和:5314

約数の個数: 36

約数和(自身を含む): 38315628

約数和(自身を除く): 18115803

約数列:

[1, 3, 5, 9, 15, 17, 25, 45, 51, 75, 85, 153, 225, 255, 425, 765, 1275, 3825, 5281, 15843, 26405, 47529, 79215, 89777, 132025, 237645, 269331, 396075, 448885, 807993, 1188225, 1346655, 2244425, 4039965, 6733275, 20199825]

約数ペア:

[(1, 20199825), (3, 6733275), (5, 4039965), (9, 2244425), (15, 1346655), (17, 1188225), (25, 807993), (45, 448885), (51, 396075), (75, 269331), (85, 237645), (153, 132025), (225, 89777), (255, 79215), (425, 47529), (765, 26405), (1275, 15843), (3825, 5281)]