21377489

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{67}}^1\times {\mathrm{2399}}^1$

素因数の和:2492

約数の個数: 16

約数和(自身を含む): 26112000

約数和(自身を除く): 4734511

約数列:

[1, 7, 19, 67, 133, 469, 1273, 2399, 8911, 16793, 45581, 160733, 319067, 1125131, 3053927, 21377489]

約数ペア:

[(1, 21377489), (7, 3053927), (19, 1125131), (67, 319067), (133, 160733), (469, 45581), (1273, 16793), (2399, 8911)]