81969979

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{89}}^1\times {\mathrm{349}}^1$

素因数の和:487

約数の個数: 32

約数和(自身を含む): 105840000

約数和(自身を除く): 23870021

約数列:

[1, 7, 13, 29, 89, 91, 203, 349, 377, 623, 1157, 2443, 2581, 2639, 4537, 8099, 10121, 18067, 31061, 31759, 33553, 70847, 131573, 217427, 234871, 403793, 900769, 921011, 2826551, 6305383, 11709997, 81969979]

約数ペア:

[(1, 81969979), (7, 11709997), (13, 6305383), (29, 2826551), (89, 921011), (91, 900769), (203, 403793), (349, 234871), (377, 217427), (623, 131573), (1157, 70847), (2443, 33553), (2581, 31759), (2639, 31061), (4537, 18067), (8099, 10121)]