21171255

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{163}}^1\times {\mathrm{1237}}^1$

素因数の和:1415

約数の個数: 32

約数和(自身を含む): 38982144

約数和(自身を除く): 17810889

約数列:

[1, 3, 5, 7, 15, 21, 35, 105, 163, 489, 815, 1141, 1237, 2445, 3423, 3711, 5705, 6185, 8659, 17115, 18555, 25977, 43295, 129885, 201631, 604893, 1008155, 1411417, 3024465, 4234251, 7057085, 21171255]

約数ペア:

[(1, 21171255), (3, 7057085), (5, 4234251), (7, 3024465), (15, 1411417), (21, 1008155), (35, 604893), (105, 201631), (163, 129885), (489, 43295), (815, 25977), (1141, 18555), (1237, 17115), (2445, 8659), (3423, 6185), (3711, 5705)]