81690580

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{131759}}^1$

素因数の和:131799

約数の個数: 24

約数和(自身を含む): 177085440

約数和(自身を除く): 95394860

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 131759, 263518, 527036, 658795, 1317590, 2635180, 4084529, 8169058, 16338116, 20422645, 40845290, 81690580]

約数ペア:

[(1, 81690580), (2, 40845290), (4, 20422645), (5, 16338116), (10, 8169058), (20, 4084529), (31, 2635180), (62, 1317590), (124, 658795), (155, 527036), (310, 263518), (620, 131759)]