20551531

素因数分解:

$7^3\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{419}}^1$

素因数の和:464

約数の個数: 32

約数和(自身を含む): 28224000

約数和(自身を除く): 7672469

約数列:

[1, 7, 11, 13, 49, 77, 91, 143, 343, 419, 539, 637, 1001, 2933, 3773, 4459, 4609, 5447, 7007, 20531, 32263, 38129, 49049, 59917, 143717, 225841, 266903, 419419, 1580887, 1868321, 2935933, 20551531]

約数ペア:

[(1, 20551531), (7, 2935933), (11, 1868321), (13, 1580887), (49, 419419), (77, 266903), (91, 225841), (143, 143717), (343, 59917), (419, 49049), (539, 38129), (637, 32263), (1001, 20531), (2933, 7007), (3773, 5447), (4459, 4609)]