21856072

素因数分解:

$2^3\times 7^1\times {\mathrm{23}}^1\times {\mathrm{71}}^1\times {\mathrm{239}}^1$

素因数の和:346

約数の個数: 64

約数和(自身を含む): 49766400

約数和(自身を除く): 27910328

約数列:

[1, 2, 4, 7, 8, 14, 23, 28, 46, 56, 71, 92, 142, 161, 184, 239, 284, 322, 478, 497, 568, 644, 956, 994, 1288, 1633, 1673, 1912, 1988, 3266, 3346, 3976, 5497, 6532, 6692, 10994, 11431, 13064, 13384, 16969, 21988, 22862, 33938, 38479, 43976, 45724, 67876, 76958, 91448, 118783, 135752, 153916, 237566, 307832, 390287, 475132, 780574, 950264, 1561148, 2732009, 3122296, 5464018, 10928036, 21856072]

約数ペア:

[(1, 21856072), (2, 10928036), (4, 5464018), (7, 3122296), (8, 2732009), (14, 1561148), (23, 950264), (28, 780574), (46, 475132), (56, 390287), (71, 307832), (92, 237566), (142, 153916), (161, 135752), (184, 118783), (239, 91448), (284, 76958), (322, 67876), (478, 45724), (497, 43976), (568, 38479), (644, 33938), (956, 22862), (994, 21988), (1288, 16969), (1633, 13384), (1673, 13064), (1912, 11431), (1988, 10994), (3266, 6692), (3346, 6532), (3976, 5497)]