21231284

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{257}}^1\times {\mathrm{1087}}^1$

素因数の和:1367

約数の個数: 24

約数和(自身を含む): 39298560

約数和(自身を除く): 18067276

約数列:

[1, 2, 4, 19, 38, 76, 257, 514, 1028, 1087, 2174, 4348, 4883, 9766, 19532, 20653, 41306, 82612, 279359, 558718, 1117436, 5307821, 10615642, 21231284]

約数ペア:

[(1, 21231284), (2, 10615642), (4, 5307821), (19, 1117436), (38, 558718), (76, 279359), (257, 82612), (514, 41306), (1028, 20653), (1087, 19532), (2174, 9766), (4348, 4883)]