21294335

素因数分解:

$5^1\times {\mathrm{101}}^1\times {\mathrm{149}}^1\times {\mathrm{283}}^1$

素因数の和:538

約数の個数: 16

約数和(自身を含む): 26071200

約数和(自身を除く): 4776865

約数列:

[1, 5, 101, 149, 283, 505, 745, 1415, 15049, 28583, 42167, 75245, 142915, 210835, 4258867, 21294335]

約数ペア:

[(1, 21294335), (5, 4258867), (101, 210835), (149, 142915), (283, 75245), (505, 42167), (745, 28583), (1415, 15049)]