21621115

素因数分解:

$5^1\times {\mathrm{79}}^1\times {\mathrm{127}}^1\times {\mathrm{431}}^1$

素因数の和:642

約数の個数: 16

約数和(自身を含む): 26542080

約数和(自身を除く): 4920965

約数列:

[1, 5, 79, 127, 395, 431, 635, 2155, 10033, 34049, 50165, 54737, 170245, 273685, 4324223, 21621115]

約数ペア:

[(1, 21621115), (5, 4324223), (79, 273685), (127, 170245), (395, 54737), (431, 50165), (635, 34049), (2155, 10033)]