28919440

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{59}}^1\times {\mathrm{557}}^1$

素因数の和:640

約数の個数: 80

約数和(自身を含む): 74727360

約数和(自身を除く): 45807920

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 59, 80, 88, 110, 118, 176, 220, 236, 295, 440, 472, 557, 590, 649, 880, 944, 1114, 1180, 1298, 2228, 2360, 2596, 2785, 3245, 4456, 4720, 5192, 5570, 6127, 6490, 8912, 10384, 11140, 12254, 12980, 22280, 24508, 25960, 30635, 32863, 44560, 49016, 51920, 61270, 65726, 98032, 122540, 131452, 164315, 245080, 262904, 328630, 361493, 490160, 525808, 657260, 722986, 1314520, 1445972, 1807465, 2629040, 2891944, 3614930, 5783888, 7229860, 14459720, 28919440]

約数ペア:

[(1, 28919440), (2, 14459720), (4, 7229860), (5, 5783888), (8, 3614930), (10, 2891944), (11, 2629040), (16, 1807465), (20, 1445972), (22, 1314520), (40, 722986), (44, 657260), (55, 525808), (59, 490160), (80, 361493), (88, 328630), (110, 262904), (118, 245080), (176, 164315), (220, 131452), (236, 122540), (295, 98032), (440, 65726), (472, 61270), (557, 51920), (590, 49016), (649, 44560), (880, 32863), (944, 30635), (1114, 25960), (1180, 24508), (1298, 22280), (2228, 12980), (2360, 12254), (2596, 11140), (2785, 10384), (3245, 8912), (4456, 6490), (4720, 6127), (5192, 5570)]