21297975

素因数分解:

$3^1\times 5^2\times {\mathrm{199}}^1\times {\mathrm{1427}}^1$

素因数の和:1639

約数の個数: 24

約数和(自身を含む): 35414400

約数和(自身を除く): 14116425

約数列:

[1, 3, 5, 15, 25, 75, 199, 597, 995, 1427, 2985, 4281, 4975, 7135, 14925, 21405, 35675, 107025, 283973, 851919, 1419865, 4259595, 7099325, 21297975]

約数ペア:

[(1, 21297975), (3, 7099325), (5, 4259595), (15, 1419865), (25, 851919), (75, 283973), (199, 107025), (597, 35675), (995, 21405), (1427, 14925), (2985, 7135), (4281, 4975)]