21576520

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{263}}^1\times {\mathrm{293}}^1$

素因数の和:574

約数の個数: 64

約数和(自身を含む): 55883520

約数和(自身を除く): 34307000

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 263, 280, 293, 526, 586, 1052, 1172, 1315, 1465, 1841, 2051, 2104, 2344, 2630, 2930, 3682, 4102, 5260, 5860, 7364, 8204, 9205, 10255, 10520, 11720, 14728, 16408, 18410, 20510, 36820, 41020, 73640, 77059, 82040, 154118, 308236, 385295, 539413, 616472, 770590, 1078826, 1541180, 2157652, 2697065, 3082360, 4315304, 5394130, 10788260, 21576520]

約数ペア:

[(1, 21576520), (2, 10788260), (4, 5394130), (5, 4315304), (7, 3082360), (8, 2697065), (10, 2157652), (14, 1541180), (20, 1078826), (28, 770590), (35, 616472), (40, 539413), (56, 385295), (70, 308236), (140, 154118), (263, 82040), (280, 77059), (293, 73640), (526, 41020), (586, 36820), (1052, 20510), (1172, 18410), (1315, 16408), (1465, 14728), (1841, 11720), (2051, 10520), (2104, 10255), (2344, 9205), (2630, 8204), (2930, 7364), (3682, 5860), (4102, 5260)]