19728289

素因数分解:

$7^1\times {\mathrm{19}}^2\times {\mathrm{37}}^1\times {\mathrm{211}}^1$

素因数の和:293

約数の個数: 24

約数和(自身を含む): 24554688

約数和(自身を除く): 4826399

約数列:

[1, 7, 19, 37, 133, 211, 259, 361, 703, 1477, 2527, 4009, 4921, 7807, 13357, 28063, 54649, 76171, 93499, 148333, 533197, 1038331, 2818327, 19728289]

約数ペア:

[(1, 19728289), (7, 2818327), (19, 1038331), (37, 533197), (133, 148333), (211, 93499), (259, 76171), (361, 54649), (703, 28063), (1477, 13357), (2527, 7807), (4009, 4921)]