81284680

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{79}}^1\times {\mathrm{887}}^1$

素因数の和:1006

約数の個数: 64

約数和(自身を含む): 191808000

約数和(自身を除く): 110523320

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 40, 58, 79, 116, 145, 158, 232, 290, 316, 395, 580, 632, 790, 887, 1160, 1580, 1774, 2291, 3160, 3548, 4435, 4582, 7096, 8870, 9164, 11455, 17740, 18328, 22910, 25723, 35480, 45820, 51446, 70073, 91640, 102892, 128615, 140146, 205784, 257230, 280292, 350365, 514460, 560584, 700730, 1028920, 1401460, 2032117, 2802920, 4064234, 8128468, 10160585, 16256936, 20321170, 40642340, 81284680]

約数ペア:

[(1, 81284680), (2, 40642340), (4, 20321170), (5, 16256936), (8, 10160585), (10, 8128468), (20, 4064234), (29, 2802920), (40, 2032117), (58, 1401460), (79, 1028920), (116, 700730), (145, 560584), (158, 514460), (232, 350365), (290, 280292), (316, 257230), (395, 205784), (580, 140146), (632, 128615), (790, 102892), (887, 91640), (1160, 70073), (1580, 51446), (1774, 45820), (2291, 35480), (3160, 25723), (3548, 22910), (4435, 18328), (4582, 17740), (7096, 11455), (8870, 9164)]