21904883

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{277}}^1$

素因数の和:387

約数の個数: 32

約数和(自身を含む): 29890560

約数和(自身を除く): 7985677

約数列:

[1, 7, 11, 13, 77, 79, 91, 143, 277, 553, 869, 1001, 1027, 1939, 3047, 3601, 6083, 7189, 11297, 21329, 21883, 25207, 39611, 79079, 153181, 240713, 277277, 284479, 1684991, 1991353, 3129269, 21904883]

約数ペア:

[(1, 21904883), (7, 3129269), (11, 1991353), (13, 1684991), (77, 284479), (79, 277277), (91, 240713), (143, 153181), (277, 79079), (553, 39611), (869, 25207), (1001, 21883), (1027, 21329), (1939, 11297), (3047, 7189), (3601, 6083)]