20798025

素因数分解:

$3^1\times 5^2\times {\mathrm{43}}^1\times {\mathrm{6449}}^1$

素因数の和:6505

約数の個数: 24

約数和(自身を含む): 35191200

約数和(自身を除く): 14393175

約数列:

[1, 3, 5, 15, 25, 43, 75, 129, 215, 645, 1075, 3225, 6449, 19347, 32245, 96735, 161225, 277307, 483675, 831921, 1386535, 4159605, 6932675, 20798025]

約数ペア:

[(1, 20798025), (3, 6932675), (5, 4159605), (15, 1386535), (25, 831921), (43, 483675), (75, 277307), (129, 161225), (215, 96735), (645, 32245), (1075, 19347), (3225, 6449)]