81193960

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{65479}}^1$

素因数の和:65521

約数の個数: 32

約数和(自身を含む): 188582400

約数和(自身を除く): 107388440

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 620, 1240, 65479, 130958, 261916, 327395, 523832, 654790, 1309580, 2029849, 2619160, 4059698, 8119396, 10149245, 16238792, 20298490, 40596980, 81193960]

約数ペア:

[(1, 81193960), (2, 40596980), (4, 20298490), (5, 16238792), (8, 10149245), (10, 8119396), (20, 4059698), (31, 2619160), (40, 2029849), (62, 1309580), (124, 654790), (155, 523832), (248, 327395), (310, 261916), (620, 130958), (1240, 65479)]