90918125

素因数分解:

$5^4\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{199}}^1$

素因数の和:279

約数の個数: 40

約数和(自身を含む): 123710400

約数和(自身を除く): 32792275

約数列:

[1, 5, 17, 25, 43, 85, 125, 199, 215, 425, 625, 731, 995, 1075, 2125, 3383, 3655, 4975, 5375, 8557, 10625, 16915, 18275, 24875, 26875, 42785, 84575, 91375, 124375, 145469, 213925, 422875, 456875, 727345, 1069625, 2114375, 3636725, 5348125, 18183625, 90918125]

約数ペア:

[(1, 90918125), (5, 18183625), (17, 5348125), (25, 3636725), (43, 2114375), (85, 1069625), (125, 727345), (199, 456875), (215, 422875), (425, 213925), (625, 145469), (731, 124375), (995, 91375), (1075, 84575), (2125, 42785), (3383, 26875), (3655, 24875), (4975, 18275), (5375, 16915), (8557, 10625)]