21951371

素因数分解:

${\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{107}}^1\times {\mathrm{367}}^1$

素因数の和:530

約数の個数: 16

約数和(自身を含む): 24482304

約数和(自身を除く): 2530933

約数列:

[1, 13, 43, 107, 367, 559, 1391, 4601, 4771, 15781, 39269, 59813, 205153, 510497, 1688567, 21951371]

約数ペア:

[(1, 21951371), (13, 1688567), (43, 510497), (107, 205153), (367, 59813), (559, 39269), (1391, 15781), (4601, 4771)]