81381760

素因数分解:

$2^7\times 5^1\times {\mathrm{101}}^1\times {\mathrm{1259}}^1$

素因数の和:1379

約数の個数: 64

約数和(自身を含む): 196635600

約数和(自身を除く): 115253840

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 101, 128, 160, 202, 320, 404, 505, 640, 808, 1010, 1259, 1616, 2020, 2518, 3232, 4040, 5036, 6295, 6464, 8080, 10072, 12590, 12928, 16160, 20144, 25180, 32320, 40288, 50360, 64640, 80576, 100720, 127159, 161152, 201440, 254318, 402880, 508636, 635795, 805760, 1017272, 1271590, 2034544, 2543180, 4069088, 5086360, 8138176, 10172720, 16276352, 20345440, 40690880, 81381760]

約数ペア:

[(1, 81381760), (2, 40690880), (4, 20345440), (5, 16276352), (8, 10172720), (10, 8138176), (16, 5086360), (20, 4069088), (32, 2543180), (40, 2034544), (64, 1271590), (80, 1017272), (101, 805760), (128, 635795), (160, 508636), (202, 402880), (320, 254318), (404, 201440), (505, 161152), (640, 127159), (808, 100720), (1010, 80576), (1259, 64640), (1616, 50360), (2020, 40288), (2518, 32320), (3232, 25180), (4040, 20144), (5036, 16160), (6295, 12928), (6464, 12590), (8080, 10072)]