21515705

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{127}}^1\times {\mathrm{1093}}^1$

素因数の和:1256

約数の個数: 16

約数和(自身を含む): 26886144

約数和(自身を除く): 5370439

約数列:

[1, 5, 31, 127, 155, 635, 1093, 3937, 5465, 19685, 33883, 138811, 169415, 694055, 4303141, 21515705]

約数ペア:

[(1, 21515705), (5, 4303141), (31, 694055), (127, 169415), (155, 138811), (635, 33883), (1093, 19685), (3937, 5465)]