21241745

素因数分解:

$5^1\times 7^2\times {\mathrm{277}}^1\times {\mathrm{313}}^1$

素因数の和:609

約数の個数: 24

約数和(自身を含む): 29853864

約数和(自身を除く): 8612119

約数列:

[1, 5, 7, 35, 49, 245, 277, 313, 1385, 1565, 1939, 2191, 9695, 10955, 13573, 15337, 67865, 76685, 86701, 433505, 606907, 3034535, 4248349, 21241745]

約数ペア:

[(1, 21241745), (5, 4248349), (7, 3034535), (35, 606907), (49, 433505), (245, 86701), (277, 76685), (313, 67865), (1385, 15337), (1565, 13573), (1939, 10955), (2191, 9695)]