20217680

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{79}}^1\times {\mathrm{457}}^1$

素因数の和:556

約数の個数: 80

約数和(自身を含む): 54520320

約数和(自身を除く): 34302640

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 79, 80, 112, 140, 158, 280, 316, 395, 457, 553, 560, 632, 790, 914, 1106, 1264, 1580, 1828, 2212, 2285, 2765, 3160, 3199, 3656, 4424, 4570, 5530, 6320, 6398, 7312, 8848, 9140, 11060, 12796, 15995, 18280, 22120, 25592, 31990, 36103, 36560, 44240, 51184, 63980, 72206, 127960, 144412, 180515, 252721, 255920, 288824, 361030, 505442, 577648, 722060, 1010884, 1263605, 1444120, 2021768, 2527210, 2888240, 4043536, 5054420, 10108840, 20217680]

約数ペア:

[(1, 20217680), (2, 10108840), (4, 5054420), (5, 4043536), (7, 2888240), (8, 2527210), (10, 2021768), (14, 1444120), (16, 1263605), (20, 1010884), (28, 722060), (35, 577648), (40, 505442), (56, 361030), (70, 288824), (79, 255920), (80, 252721), (112, 180515), (140, 144412), (158, 127960), (280, 72206), (316, 63980), (395, 51184), (457, 44240), (553, 36560), (560, 36103), (632, 31990), (790, 25592), (914, 22120), (1106, 18280), (1264, 15995), (1580, 12796), (1828, 11060), (2212, 9140), (2285, 8848), (2765, 7312), (3160, 6398), (3199, 6320), (3656, 5530), (4424, 4570)]