19899841

素因数分解:

${\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{97}}^1\times {\mathrm{367}}^1$

素因数の和:520

約数の個数: 16

約数和(自身を含む): 22215424

約数和(自身を除く): 2315583

約数列:

[1, 13, 43, 97, 367, 559, 1261, 4171, 4771, 15781, 35599, 54223, 205153, 462787, 1530757, 19899841]

約数ペア:

[(1, 19899841), (13, 1530757), (43, 462787), (97, 205153), (367, 54223), (559, 35599), (1261, 15781), (4171, 4771)]