21365960

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{991}}^1$

素因数の和:1027

約数の個数: 96

約数和(自身を含む): 61067520

約数和(自身を除く): 39701560

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 20, 22, 28, 35, 40, 44, 49, 55, 56, 70, 77, 88, 98, 110, 140, 154, 196, 220, 245, 280, 308, 385, 392, 440, 490, 539, 616, 770, 980, 991, 1078, 1540, 1960, 1982, 2156, 2695, 3080, 3964, 4312, 4955, 5390, 6937, 7928, 9910, 10780, 10901, 13874, 19820, 21560, 21802, 27748, 34685, 39640, 43604, 48559, 54505, 55496, 69370, 76307, 87208, 97118, 109010, 138740, 152614, 194236, 218020, 242795, 277480, 305228, 381535, 388472, 436040, 485590, 534149, 610456, 763070, 971180, 1068298, 1526140, 1942360, 2136596, 2670745, 3052280, 4273192, 5341490, 10682980, 21365960]

約数ペア:

[(1, 21365960), (2, 10682980), (4, 5341490), (5, 4273192), (7, 3052280), (8, 2670745), (10, 2136596), (11, 1942360), (14, 1526140), (20, 1068298), (22, 971180), (28, 763070), (35, 610456), (40, 534149), (44, 485590), (49, 436040), (55, 388472), (56, 381535), (70, 305228), (77, 277480), (88, 242795), (98, 218020), (110, 194236), (140, 152614), (154, 138740), (196, 109010), (220, 97118), (245, 87208), (280, 76307), (308, 69370), (385, 55496), (392, 54505), (440, 48559), (490, 43604), (539, 39640), (616, 34685), (770, 27748), (980, 21802), (991, 21560), (1078, 19820), (1540, 13874), (1960, 10901), (1982, 10780), (2156, 9910), (2695, 7928), (3080, 6937), (3964, 5390), (4312, 4955)]