20790715

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{59}}^1\times {\mathrm{149}}^1$

素因数の和:267

約数の個数: 32

約数和(自身を含む): 28512000

約数和(自身を除く): 7721285

約数列:

[1, 5, 11, 43, 55, 59, 149, 215, 295, 473, 649, 745, 1639, 2365, 2537, 3245, 6407, 8195, 8791, 12685, 27907, 32035, 43955, 70477, 96701, 139535, 352385, 378013, 483505, 1890065, 4158143, 20790715]

約数ペア:

[(1, 20790715), (5, 4158143), (11, 1890065), (43, 483505), (55, 378013), (59, 352385), (149, 139535), (215, 96701), (295, 70477), (473, 43955), (649, 32035), (745, 27907), (1639, 12685), (2365, 8791), (2537, 8195), (3245, 6407)]