21291278

素因数分解:

$2^1\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{8537}}^1$

素因数の和:8611

約数の個数: 16

約数和(自身を含む): 33810480

約数和(自身を除く): 12519202

約数列:

[1, 2, 29, 43, 58, 86, 1247, 2494, 8537, 17074, 247573, 367091, 495146, 734182, 10645639, 21291278]

約数ペア:

[(1, 21291278), (2, 10645639), (29, 734182), (43, 495146), (58, 367091), (86, 247573), (1247, 17074), (2494, 8537)]