20542720

素因数分解:

$2^8\times 5^1\times {\mathrm{11}}^1\times {\mathrm{1459}}^1$

素因数の和:1491

約数の個数: 72

約数和(自身を含む): 53716320

約数和(自身を除く): 33173600

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 44, 55, 64, 80, 88, 110, 128, 160, 176, 220, 256, 320, 352, 440, 640, 704, 880, 1280, 1408, 1459, 1760, 2816, 2918, 3520, 5836, 7040, 7295, 11672, 14080, 14590, 16049, 23344, 29180, 32098, 46688, 58360, 64196, 80245, 93376, 116720, 128392, 160490, 186752, 233440, 256784, 320980, 373504, 466880, 513568, 641960, 933760, 1027136, 1283920, 1867520, 2054272, 2567840, 4108544, 5135680, 10271360, 20542720]

約数ペア:

[(1, 20542720), (2, 10271360), (4, 5135680), (5, 4108544), (8, 2567840), (10, 2054272), (11, 1867520), (16, 1283920), (20, 1027136), (22, 933760), (32, 641960), (40, 513568), (44, 466880), (55, 373504), (64, 320980), (80, 256784), (88, 233440), (110, 186752), (128, 160490), (160, 128392), (176, 116720), (220, 93376), (256, 80245), (320, 64196), (352, 58360), (440, 46688), (640, 32098), (704, 29180), (880, 23344), (1280, 16049), (1408, 14590), (1459, 14080), (1760, 11672), (2816, 7295), (2918, 7040), (3520, 5836)]