20911670

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{5189}}^1$

素因数の和:5240

約数の個数: 32

約数和(自身を含む): 41852160

約数和(自身を除く): 20940490

約数列:

[1, 2, 5, 10, 13, 26, 31, 62, 65, 130, 155, 310, 403, 806, 2015, 4030, 5189, 10378, 25945, 51890, 67457, 134914, 160859, 321718, 337285, 674570, 804295, 1608590, 2091167, 4182334, 10455835, 20911670]

約数ペア:

[(1, 20911670), (2, 10455835), (5, 4182334), (10, 2091167), (13, 1608590), (26, 804295), (31, 674570), (62, 337285), (65, 321718), (130, 160859), (155, 134914), (310, 67457), (403, 51890), (806, 25945), (2015, 10378), (4030, 5189)]