21293328

素因数分解:

$2^4\times 3^1\times 7^1\times {\mathrm{127}}^1\times {\mathrm{499}}^1$

素因数の和:644

約数の個数: 80

約数和(自身を含む): 63488000

約数和(自身を除く): 42194672

約数列:

[1, 2, 3, 4, 6, 7, 8, 12, 14, 16, 21, 24, 28, 42, 48, 56, 84, 112, 127, 168, 254, 336, 381, 499, 508, 762, 889, 998, 1016, 1497, 1524, 1778, 1996, 2032, 2667, 2994, 3048, 3493, 3556, 3992, 5334, 5988, 6096, 6986, 7112, 7984, 10479, 10668, 11976, 13972, 14224, 20958, 21336, 23952, 27944, 41916, 42672, 55888, 63373, 83832, 126746, 167664, 190119, 253492, 380238, 443611, 506984, 760476, 887222, 1013968, 1330833, 1520952, 1774444, 2661666, 3041904, 3548888, 5323332, 7097776, 10646664, 21293328]

約数ペア:

[(1, 21293328), (2, 10646664), (3, 7097776), (4, 5323332), (6, 3548888), (7, 3041904), (8, 2661666), (12, 1774444), (14, 1520952), (16, 1330833), (21, 1013968), (24, 887222), (28, 760476), (42, 506984), (48, 443611), (56, 380238), (84, 253492), (112, 190119), (127, 167664), (168, 126746), (254, 83832), (336, 63373), (381, 55888), (499, 42672), (508, 41916), (762, 27944), (889, 23952), (998, 21336), (1016, 20958), (1497, 14224), (1524, 13972), (1778, 11976), (1996, 10668), (2032, 10479), (2667, 7984), (2994, 7112), (3048, 6986), (3493, 6096), (3556, 5988), (3992, 5334)]