20646250

素因数分解:

$2^1\times 5^4\times {\mathrm{83}}^1\times {\mathrm{199}}^1$

素因数の和:304

約数の個数: 40

約数和(自身を含む): 39362400

約数和(自身を除く): 18716150

約数列:

[1, 2, 5, 10, 25, 50, 83, 125, 166, 199, 250, 398, 415, 625, 830, 995, 1250, 1990, 2075, 4150, 4975, 9950, 10375, 16517, 20750, 24875, 33034, 49750, 51875, 82585, 103750, 124375, 165170, 248750, 412925, 825850, 2064625, 4129250, 10323125, 20646250]

約数ペア:

[(1, 20646250), (2, 10323125), (5, 4129250), (10, 2064625), (25, 825850), (50, 412925), (83, 248750), (125, 165170), (166, 124375), (199, 103750), (250, 82585), (398, 51875), (415, 49750), (625, 33034), (830, 24875), (995, 20750), (1250, 16517), (1990, 10375), (2075, 9950), (4150, 4975)]