21717639

素因数分解:

$3^6\times {\mathrm{31}}^3$

素因数の和:111

約数の個数: 28

約数和(自身を含む): 33646912

約数和(自身を除く): 11929273

約数列:

[1, 3, 9, 27, 31, 81, 93, 243, 279, 729, 837, 961, 2511, 2883, 7533, 8649, 22599, 25947, 29791, 77841, 89373, 233523, 268119, 700569, 804357, 2413071, 7239213, 21717639]

約数ペア:

[(1, 21717639), (3, 7239213), (9, 2413071), (27, 804357), (31, 700569), (81, 268119), (93, 233523), (243, 89373), (279, 77841), (729, 29791), (837, 25947), (961, 22599), (2511, 8649), (2883, 7533)]