21296997

素因数分解:

$3^2\times {\mathrm{43}}^1\times {\mathrm{113}}^1\times {\mathrm{487}}^1$

素因数の和:649

約数の個数: 24

約数和(自身を含む): 31821504

約数和(自身を除く): 10524507

約数列:

[1, 3, 9, 43, 113, 129, 339, 387, 487, 1017, 1461, 4383, 4859, 14577, 20941, 43731, 55031, 62823, 165093, 188469, 495279, 2366333, 7098999, 21296997]

約数ペア:

[(1, 21296997), (3, 7098999), (9, 2366333), (43, 495279), (113, 188469), (129, 165093), (339, 62823), (387, 55031), (487, 43731), (1017, 20941), (1461, 14577), (4383, 4859)]