19405981

素因数分解:

$7^1\times {\mathrm{83}}^1\times {\mathrm{127}}^1\times {\mathrm{263}}^1$

素因数の和:480

約数の個数: 16

約数和(自身を含む): 22708224

約数和(自身を除く): 3302243

約数列:

[1, 7, 83, 127, 263, 581, 889, 1841, 10541, 21829, 33401, 73787, 152803, 233807, 2772283, 19405981]

約数ペア:

[(1, 19405981), (7, 2772283), (83, 233807), (127, 152803), (263, 73787), (581, 33401), (889, 21829), (1841, 10541)]