19201779

素因数分解:

$3^4\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{149}}^1$

素因数の和:241

約数の個数: 40

約数和(自身を含む): 30346800

約数和(自身を除く): 11145021

約数列:

[1, 3, 9, 27, 37, 43, 81, 111, 129, 149, 333, 387, 447, 999, 1161, 1341, 1591, 2997, 3483, 4023, 4773, 5513, 6407, 12069, 14319, 16539, 19221, 42957, 49617, 57663, 128871, 148851, 172989, 237059, 446553, 518967, 711177, 2133531, 6400593, 19201779]

約数ペア:

[(1, 19201779), (3, 6400593), (9, 2133531), (27, 711177), (37, 518967), (43, 446553), (81, 237059), (111, 172989), (129, 148851), (149, 128871), (333, 57663), (387, 49617), (447, 42957), (999, 19221), (1161, 16539), (1341, 14319), (1591, 12069), (2997, 6407), (3483, 5513), (4023, 4773)]