20265280

素因数分解:

$2^6\times 5^1\times 7^1\times {\mathrm{83}}^1\times {\mathrm{109}}^1$

素因数の和:216

約数の個数: 112

約数和(自身を含む): 56327040

約数和(自身を除く): 36061760

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 56, 64, 70, 80, 83, 109, 112, 140, 160, 166, 218, 224, 280, 320, 332, 415, 436, 448, 545, 560, 581, 664, 763, 830, 872, 1090, 1120, 1162, 1328, 1526, 1660, 1744, 2180, 2240, 2324, 2656, 2905, 3052, 3320, 3488, 3815, 4360, 4648, 5312, 5810, 6104, 6640, 6976, 7630, 8720, 9047, 9296, 11620, 12208, 13280, 15260, 17440, 18094, 18592, 23240, 24416, 26560, 30520, 34880, 36188, 37184, 45235, 46480, 48832, 61040, 63329, 72376, 90470, 92960, 122080, 126658, 144752, 180940, 185920, 244160, 253316, 289504, 316645, 361880, 506632, 579008, 633290, 723760, 1013264, 1266580, 1447520, 2026528, 2533160, 2895040, 4053056, 5066320, 10132640, 20265280]

約数ペア:

[(1, 20265280), (2, 10132640), (4, 5066320), (5, 4053056), (7, 2895040), (8, 2533160), (10, 2026528), (14, 1447520), (16, 1266580), (20, 1013264), (28, 723760), (32, 633290), (35, 579008), (40, 506632), (56, 361880), (64, 316645), (70, 289504), (80, 253316), (83, 244160), (109, 185920), (112, 180940), (140, 144752), (160, 126658), (166, 122080), (218, 92960), (224, 90470), (280, 72376), (320, 63329), (332, 61040), (415, 48832), (436, 46480), (448, 45235), (545, 37184), (560, 36188), (581, 34880), (664, 30520), (763, 26560), (830, 24416), (872, 23240), (1090, 18592), (1120, 18094), (1162, 17440), (1328, 15260), (1526, 13280), (1660, 12208), (1744, 11620), (2180, 9296), (2240, 9047), (2324, 8720), (2656, 7630), (2905, 6976), (3052, 6640), (3320, 6104), (3488, 5810), (3815, 5312), (4360, 4648)]