81486920

素因数分解:

$2^3\times 5^1\times {\mathrm{79}}^1\times {\mathrm{107}}^1\times {\mathrm{241}}^1$

素因数の和:438

約数の個数: 64

約数和(自身を含む): 188179200

約数和(自身を除く): 106692280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 79, 107, 158, 214, 241, 316, 395, 428, 482, 535, 632, 790, 856, 964, 1070, 1205, 1580, 1928, 2140, 2410, 3160, 4280, 4820, 8453, 9640, 16906, 19039, 25787, 33812, 38078, 42265, 51574, 67624, 76156, 84530, 95195, 103148, 128935, 152312, 169060, 190390, 206296, 257870, 338120, 380780, 515740, 761560, 1031480, 2037173, 4074346, 8148692, 10185865, 16297384, 20371730, 40743460, 81486920]

約数ペア:

[(1, 81486920), (2, 40743460), (4, 20371730), (5, 16297384), (8, 10185865), (10, 8148692), (20, 4074346), (40, 2037173), (79, 1031480), (107, 761560), (158, 515740), (214, 380780), (241, 338120), (316, 257870), (395, 206296), (428, 190390), (482, 169060), (535, 152312), (632, 128935), (790, 103148), (856, 95195), (964, 84530), (1070, 76156), (1205, 67624), (1580, 51574), (1928, 42265), (2140, 38078), (2410, 33812), (3160, 25787), (4280, 19039), (4820, 16906), (8453, 9640)]