20940920

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{523}}^1$

素因数の和:565

約数の個数: 128

約数和(自身を含む): 63383040

約数和(自身を除く): 42442120

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 13, 14, 20, 22, 26, 28, 35, 40, 44, 52, 55, 56, 65, 70, 77, 88, 91, 104, 110, 130, 140, 143, 154, 182, 220, 260, 280, 286, 308, 364, 385, 440, 455, 520, 523, 572, 616, 715, 728, 770, 910, 1001, 1046, 1144, 1430, 1540, 1820, 2002, 2092, 2615, 2860, 3080, 3640, 3661, 4004, 4184, 5005, 5230, 5720, 5753, 6799, 7322, 8008, 10010, 10460, 11506, 13598, 14644, 18305, 20020, 20920, 23012, 27196, 28765, 29288, 33995, 36610, 40040, 40271, 46024, 47593, 54392, 57530, 67990, 73220, 74789, 80542, 95186, 115060, 135980, 146440, 149578, 161084, 190372, 201355, 230120, 237965, 271960, 299156, 322168, 373945, 380744, 402710, 475930, 523523, 598312, 747890, 805420, 951860, 1047046, 1495780, 1610840, 1903720, 2094092, 2617615, 2991560, 4188184, 5235230, 10470460, 20940920]

約数ペア:

[(1, 20940920), (2, 10470460), (4, 5235230), (5, 4188184), (7, 2991560), (8, 2617615), (10, 2094092), (11, 1903720), (13, 1610840), (14, 1495780), (20, 1047046), (22, 951860), (26, 805420), (28, 747890), (35, 598312), (40, 523523), (44, 475930), (52, 402710), (55, 380744), (56, 373945), (65, 322168), (70, 299156), (77, 271960), (88, 237965), (91, 230120), (104, 201355), (110, 190372), (130, 161084), (140, 149578), (143, 146440), (154, 135980), (182, 115060), (220, 95186), (260, 80542), (280, 74789), (286, 73220), (308, 67990), (364, 57530), (385, 54392), (440, 47593), (455, 46024), (520, 40271), (523, 40040), (572, 36610), (616, 33995), (715, 29288), (728, 28765), (770, 27196), (910, 23012), (1001, 20920), (1046, 20020), (1144, 18305), (1430, 14644), (1540, 13598), (1820, 11506), (2002, 10460), (2092, 10010), (2615, 8008), (2860, 7322), (3080, 6799), (3640, 5753), (3661, 5720), (4004, 5230), (4184, 5005)]