28556515

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{601}}^1$

素因数の和:679

約数の個数: 32

約数和(自身を含む): 40049856

約数和(自身を除く): 11493341

約数列:

[1, 5, 13, 17, 43, 65, 85, 215, 221, 559, 601, 731, 1105, 2795, 3005, 3655, 7813, 9503, 10217, 25843, 39065, 47515, 51085, 129215, 132821, 335959, 439331, 664105, 1679795, 2196655, 5711303, 28556515]

約数ペア:

[(1, 28556515), (5, 5711303), (13, 2196655), (17, 1679795), (43, 664105), (65, 439331), (85, 335959), (215, 132821), (221, 129215), (559, 51085), (601, 47515), (731, 39065), (1105, 25843), (2795, 10217), (3005, 9503), (3655, 7813)]