251298710

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{127}}^1\times {\mathrm{491}}^1$

素因数の和:669

約数の個数: 64

約数和(自身を含む): 507838464

約数和(自身を除く): 256539754

約数列:

[1, 2, 5, 10, 13, 26, 31, 62, 65, 127, 130, 155, 254, 310, 403, 491, 635, 806, 982, 1270, 1651, 2015, 2455, 3302, 3937, 4030, 4910, 6383, 7874, 8255, 12766, 15221, 16510, 19685, 30442, 31915, 39370, 51181, 62357, 63830, 76105, 102362, 124714, 152210, 197873, 255905, 311785, 395746, 511810, 623570, 810641, 989365, 1621282, 1933067, 1978730, 3866134, 4053205, 8106410, 9665335, 19330670, 25129871, 50259742, 125649355, 251298710]

約数ペア:

[(1, 251298710), (2, 125649355), (5, 50259742), (10, 25129871), (13, 19330670), (26, 9665335), (31, 8106410), (62, 4053205), (65, 3866134), (127, 1978730), (130, 1933067), (155, 1621282), (254, 989365), (310, 810641), (403, 623570), (491, 511810), (635, 395746), (806, 311785), (982, 255905), (1270, 197873), (1651, 152210), (2015, 124714), (2455, 102362), (3302, 76105), (3937, 63830), (4030, 62357), (4910, 51181), (6383, 39370), (7874, 31915), (8255, 30442), (12766, 19685), (15221, 16510)]