81872080

素因数分解:

$2^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{109}}^1\times {\mathrm{229}}^1$

素因数の和:392

約数の個数: 80

約数和(自身を含む): 197643600

約数和(自身を除く): 115771520

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 41, 80, 82, 109, 164, 205, 218, 229, 328, 410, 436, 458, 545, 656, 820, 872, 916, 1090, 1145, 1640, 1744, 1832, 2180, 2290, 3280, 3664, 4360, 4469, 4580, 8720, 8938, 9160, 9389, 17876, 18320, 18778, 22345, 24961, 35752, 37556, 44690, 46945, 49922, 71504, 75112, 89380, 93890, 99844, 124805, 150224, 178760, 187780, 199688, 249610, 357520, 375560, 399376, 499220, 751120, 998440, 1023401, 1996880, 2046802, 4093604, 5117005, 8187208, 10234010, 16374416, 20468020, 40936040, 81872080]

約数ペア:

[(1, 81872080), (2, 40936040), (4, 20468020), (5, 16374416), (8, 10234010), (10, 8187208), (16, 5117005), (20, 4093604), (40, 2046802), (41, 1996880), (80, 1023401), (82, 998440), (109, 751120), (164, 499220), (205, 399376), (218, 375560), (229, 357520), (328, 249610), (410, 199688), (436, 187780), (458, 178760), (545, 150224), (656, 124805), (820, 99844), (872, 93890), (916, 89380), (1090, 75112), (1145, 71504), (1640, 49922), (1744, 46945), (1832, 44690), (2180, 37556), (2290, 35752), (3280, 24961), (3664, 22345), (4360, 18778), (4469, 18320), (4580, 17876), (8720, 9389), (8938, 9160)]