19887215

素因数分解:

$5^1\times {\mathrm{83}}^1\times {\mathrm{173}}^1\times {\mathrm{277}}^1$

素因数の和:538

約数の個数: 16

約数和(自身を含む): 24379488

約数和(自身を除く): 4492273

約数列:

[1, 5, 83, 173, 277, 415, 865, 1385, 14359, 22991, 47921, 71795, 114955, 239605, 3977443, 19887215]

約数ペア:

[(1, 19887215), (5, 3977443), (83, 239605), (173, 114955), (277, 71795), (415, 47921), (865, 22991), (1385, 14359)]