81426980

素因数分解:

$2^2\times 5^1\times {\mathrm{131}}^1\times {\mathrm{31079}}^1$

素因数の和:31219

約数の個数: 24

約数和(自身を含む): 172307520

約数和(自身を除く): 90880540

約数列:

[1, 2, 4, 5, 10, 20, 131, 262, 524, 655, 1310, 2620, 31079, 62158, 124316, 155395, 310790, 621580, 4071349, 8142698, 16285396, 20356745, 40713490, 81426980]

約数ペア:

[(1, 81426980), (2, 40713490), (4, 20356745), (5, 16285396), (10, 8142698), (20, 4071349), (131, 621580), (262, 310790), (524, 155395), (655, 124316), (1310, 62158), (2620, 31079)]