19872008

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{109}}^1\times {\mathrm{1753}}^1$

素因数の和:1881

約数の個数: 32

約数和(自身を含む): 40517400

約数和(自身を除く): 20645392

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 109, 218, 436, 872, 1417, 1753, 2834, 3506, 5668, 7012, 11336, 14024, 22789, 45578, 91156, 182312, 191077, 382154, 764308, 1528616, 2484001, 4968002, 9936004, 19872008]

約数ペア:

[(1, 19872008), (2, 9936004), (4, 4968002), (8, 2484001), (13, 1528616), (26, 764308), (52, 382154), (104, 191077), (109, 182312), (218, 91156), (436, 45578), (872, 22789), (1417, 14024), (1753, 11336), (2834, 7012), (3506, 5668)]