19975839

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{257}}^1\times {\mathrm{1993}}^1$

素因数の和:2266

約数の個数: 16

約数和(自身を含む): 28809312

約数和(自身を除く): 8833473

約数列:

[1, 3, 13, 39, 257, 771, 1993, 3341, 5979, 10023, 25909, 77727, 512201, 1536603, 6658613, 19975839]

約数ペア:

[(1, 19975839), (3, 6658613), (13, 1536603), (39, 512201), (257, 77727), (771, 25909), (1993, 10023), (3341, 5979)]