81325940

素因数分解:

$2^2\times 5^1\times {\mathrm{67}}^1\times {\mathrm{137}}^1\times {\mathrm{443}}^1$

素因数の和:656

約数の個数: 48

約数和(自身を含む): 174992832

約数和(自身を除く): 93666892

約数列:

[1, 2, 4, 5, 10, 20, 67, 134, 137, 268, 274, 335, 443, 548, 670, 685, 886, 1340, 1370, 1772, 2215, 2740, 4430, 8860, 9179, 18358, 29681, 36716, 45895, 59362, 60691, 91790, 118724, 121382, 148405, 183580, 242764, 296810, 303455, 593620, 606910, 1213820, 4066297, 8132594, 16265188, 20331485, 40662970, 81325940]

約数ペア:

[(1, 81325940), (2, 40662970), (4, 20331485), (5, 16265188), (10, 8132594), (20, 4066297), (67, 1213820), (134, 606910), (137, 593620), (268, 303455), (274, 296810), (335, 242764), (443, 183580), (548, 148405), (670, 121382), (685, 118724), (886, 91790), (1340, 60691), (1370, 59362), (1772, 45895), (2215, 36716), (2740, 29681), (4430, 18358), (8860, 9179)]