20884585

素因数分解:

$5^1\times {\mathrm{17}}^2\times {\mathrm{97}}^1\times {\mathrm{149}}^1$

素因数の和:285

約数の個数: 24

約数和(自身を含む): 27077400

約数和(自身を除く): 6192815

約数列:

[1, 5, 17, 85, 97, 149, 289, 485, 745, 1445, 1649, 2533, 8245, 12665, 14453, 28033, 43061, 72265, 140165, 215305, 245701, 1228505, 4176917, 20884585]

約数ペア:

[(1, 20884585), (5, 4176917), (17, 1228505), (85, 245701), (97, 215305), (149, 140165), (289, 72265), (485, 43061), (745, 28033), (1445, 14453), (1649, 12665), (2533, 8245)]