20509280

素因数分解:

$2^5\times 5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{271}}^1$

素因数の和:340

約数の個数: 96

約数和(自身を含む): 54286848

約数和(自身を除く): 33777568

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 43, 44, 55, 80, 86, 88, 110, 160, 172, 176, 215, 220, 271, 344, 352, 430, 440, 473, 542, 688, 860, 880, 946, 1084, 1355, 1376, 1720, 1760, 1892, 2168, 2365, 2710, 2981, 3440, 3784, 4336, 4730, 5420, 5962, 6880, 7568, 8672, 9460, 10840, 11653, 11924, 14905, 15136, 18920, 21680, 23306, 23848, 29810, 37840, 43360, 46612, 47696, 58265, 59620, 75680, 93224, 95392, 116530, 119240, 128183, 186448, 233060, 238480, 256366, 372896, 466120, 476960, 512732, 640915, 932240, 1025464, 1281830, 1864480, 2050928, 2563660, 4101856, 5127320, 10254640, 20509280]

約数ペア:

[(1, 20509280), (2, 10254640), (4, 5127320), (5, 4101856), (8, 2563660), (10, 2050928), (11, 1864480), (16, 1281830), (20, 1025464), (22, 932240), (32, 640915), (40, 512732), (43, 476960), (44, 466120), (55, 372896), (80, 256366), (86, 238480), (88, 233060), (110, 186448), (160, 128183), (172, 119240), (176, 116530), (215, 95392), (220, 93224), (271, 75680), (344, 59620), (352, 58265), (430, 47696), (440, 46612), (473, 43360), (542, 37840), (688, 29810), (860, 23848), (880, 23306), (946, 21680), (1084, 18920), (1355, 15136), (1376, 14905), (1720, 11924), (1760, 11653), (1892, 10840), (2168, 9460), (2365, 8672), (2710, 7568), (2981, 6880), (3440, 5962), (3784, 5420), (4336, 4730)]