21698665

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{3217}}^1$

素因数の和:3312

約数の個数: 16

約数和(自身を含む): 27803520

約数和(自身を除く): 6104855

約数列:

[1, 5, 19, 71, 95, 355, 1349, 3217, 6745, 16085, 61123, 228407, 305615, 1142035, 4339733, 21698665]

約数ペア:

[(1, 21698665), (5, 4339733), (19, 1142035), (71, 305615), (95, 228407), (355, 61123), (1349, 16085), (3217, 6745)]