21272251

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{269}}^1$

素因数の和:379

約数の個数: 32

約数和(自身を含む): 29030400

約数和(自身を除く): 7758149

約数列:

[1, 7, 11, 13, 77, 79, 91, 143, 269, 553, 869, 1001, 1027, 1883, 2959, 3497, 6083, 7189, 11297, 20713, 21251, 24479, 38467, 79079, 148757, 233761, 269269, 276263, 1636327, 1933841, 3038893, 21272251]

約数ペア:

[(1, 21272251), (7, 3038893), (11, 1933841), (13, 1636327), (77, 276263), (79, 269269), (91, 233761), (143, 148757), (269, 79079), (553, 38467), (869, 24479), (1001, 21251), (1027, 20713), (1883, 11297), (2959, 7189), (3497, 6083)]