20944750

素因数分解:

$2^1\times 5^3\times {\mathrm{199}}^1\times {\mathrm{421}}^1$

素因数の和:637

約数の個数: 32

約数和(自身を含む): 39499200

約数和(自身を除く): 18554450

約数列:

[1, 2, 5, 10, 25, 50, 125, 199, 250, 398, 421, 842, 995, 1990, 2105, 4210, 4975, 9950, 10525, 21050, 24875, 49750, 52625, 83779, 105250, 167558, 418895, 837790, 2094475, 4188950, 10472375, 20944750]

約数ペア:

[(1, 20944750), (2, 10472375), (5, 4188950), (10, 2094475), (25, 837790), (50, 418895), (125, 167558), (199, 105250), (250, 83779), (398, 52625), (421, 49750), (842, 24875), (995, 21050), (1990, 10525), (2105, 9950), (4210, 4975)]