21890440

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{89}}^1$

素因数の和:167

約数の個数: 128

約数和(自身を含む): 59875200

約数和(自身を除く): 37984760

約数列:

[1, 2, 4, 5, 8, 10, 11, 13, 20, 22, 26, 40, 43, 44, 52, 55, 65, 86, 88, 89, 104, 110, 130, 143, 172, 178, 215, 220, 260, 286, 344, 356, 430, 440, 445, 473, 520, 559, 572, 712, 715, 860, 890, 946, 979, 1118, 1144, 1157, 1430, 1720, 1780, 1892, 1958, 2236, 2314, 2365, 2795, 2860, 3560, 3784, 3827, 3916, 4472, 4628, 4730, 4895, 5590, 5720, 5785, 6149, 7654, 7832, 9256, 9460, 9790, 11180, 11570, 12298, 12727, 15308, 18920, 19135, 19580, 22360, 23140, 24596, 25454, 30616, 30745, 38270, 39160, 42097, 46280, 49192, 49751, 50908, 61490, 63635, 76540, 84194, 99502, 101816, 122980, 127270, 153080, 168388, 199004, 210485, 245960, 248755, 254540, 336776, 398008, 420970, 497510, 509080, 547261, 841940, 995020, 1094522, 1683880, 1990040, 2189044, 2736305, 4378088, 5472610, 10945220, 21890440]

約数ペア:

[(1, 21890440), (2, 10945220), (4, 5472610), (5, 4378088), (8, 2736305), (10, 2189044), (11, 1990040), (13, 1683880), (20, 1094522), (22, 995020), (26, 841940), (40, 547261), (43, 509080), (44, 497510), (52, 420970), (55, 398008), (65, 336776), (86, 254540), (88, 248755), (89, 245960), (104, 210485), (110, 199004), (130, 168388), (143, 153080), (172, 127270), (178, 122980), (215, 101816), (220, 99502), (260, 84194), (286, 76540), (344, 63635), (356, 61490), (430, 50908), (440, 49751), (445, 49192), (473, 46280), (520, 42097), (559, 39160), (572, 38270), (712, 30745), (715, 30616), (860, 25454), (890, 24596), (946, 23140), (979, 22360), (1118, 19580), (1144, 19135), (1157, 18920), (1430, 15308), (1720, 12727), (1780, 12298), (1892, 11570), (1958, 11180), (2236, 9790), (2314, 9460), (2365, 9256), (2795, 7832), (2860, 7654), (3560, 6149), (3784, 5785), (3827, 5720), (3916, 5590), (4472, 4895), (4628, 4730)]