81780625

素因数分解:

$5^4\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{179}}^1$

素因数の和:259

約数の個数: 40

約数和(自身を含む): 111339360

約数和(自身を除く): 29558735

約数列:

[1, 5, 17, 25, 43, 85, 125, 179, 215, 425, 625, 731, 895, 1075, 2125, 3043, 3655, 4475, 5375, 7697, 10625, 15215, 18275, 22375, 26875, 38485, 76075, 91375, 111875, 130849, 192425, 380375, 456875, 654245, 962125, 1901875, 3271225, 4810625, 16356125, 81780625]

約数ペア:

[(1, 81780625), (5, 16356125), (17, 4810625), (25, 3271225), (43, 1901875), (85, 962125), (125, 654245), (179, 456875), (215, 380375), (425, 192425), (625, 130849), (731, 111875), (895, 91375), (1075, 76075), (2125, 38485), (3043, 26875), (3655, 22375), (4475, 18275), (5375, 15215), (7697, 10625)]