21195705

素因数分解:

$3^1\times 5^1\times {\mathrm{163}}^1\times {\mathrm{8669}}^1$

素因数の和:8840

約数の個数: 16

約数和(自身を含む): 34125120

約数和(自身を除く): 12929415

約数列:

[1, 3, 5, 15, 163, 489, 815, 2445, 8669, 26007, 43345, 130035, 1413047, 4239141, 7065235, 21195705]

約数ペア:

[(1, 21195705), (3, 7065235), (5, 4239141), (15, 1413047), (163, 130035), (489, 43345), (815, 26007), (2445, 8669)]