209331903

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{173}}^1\times {\mathrm{991}}^1$

素因数の和:1215

約数の個数: 32

約数和(自身を含む): 314836992

約数和(自身を除く): 105505089

約数列:

[1, 3, 11, 33, 37, 111, 173, 407, 519, 991, 1221, 1903, 2973, 5709, 6401, 10901, 19203, 32703, 36667, 70411, 110001, 171443, 211233, 403337, 514329, 1210011, 1885873, 5657619, 6343391, 19030173, 69777301, 209331903]

約数ペア:

[(1, 209331903), (3, 69777301), (11, 19030173), (33, 6343391), (37, 5657619), (111, 1885873), (173, 1210011), (407, 514329), (519, 403337), (991, 211233), (1221, 171443), (1903, 110001), (2973, 70411), (5709, 36667), (6401, 32703), (10901, 19203)]