21784840

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{643}}^1$

素因数の和:683

約数の個数: 96

約数和(自身を含む): 61669440

約数和(自身を除く): 39884600

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 20, 22, 28, 35, 40, 44, 55, 56, 70, 77, 88, 110, 121, 140, 154, 220, 242, 280, 308, 385, 440, 484, 605, 616, 643, 770, 847, 968, 1210, 1286, 1540, 1694, 2420, 2572, 3080, 3215, 3388, 4235, 4501, 4840, 5144, 6430, 6776, 7073, 8470, 9002, 12860, 14146, 16940, 18004, 22505, 25720, 28292, 33880, 35365, 36008, 45010, 49511, 56584, 70730, 77803, 90020, 99022, 141460, 155606, 180040, 198044, 247555, 282920, 311212, 389015, 396088, 495110, 544621, 622424, 778030, 990220, 1089242, 1556060, 1980440, 2178484, 2723105, 3112120, 4356968, 5446210, 10892420, 21784840]

約数ペア:

[(1, 21784840), (2, 10892420), (4, 5446210), (5, 4356968), (7, 3112120), (8, 2723105), (10, 2178484), (11, 1980440), (14, 1556060), (20, 1089242), (22, 990220), (28, 778030), (35, 622424), (40, 544621), (44, 495110), (55, 396088), (56, 389015), (70, 311212), (77, 282920), (88, 247555), (110, 198044), (121, 180040), (140, 155606), (154, 141460), (220, 99022), (242, 90020), (280, 77803), (308, 70730), (385, 56584), (440, 49511), (484, 45010), (605, 36008), (616, 35365), (643, 33880), (770, 28292), (847, 25720), (968, 22505), (1210, 18004), (1286, 16940), (1540, 14146), (1694, 12860), (2420, 9002), (2572, 8470), (3080, 7073), (3215, 6776), (3388, 6430), (4235, 5144), (4501, 4840)]