21428561

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{97}}^1\times {\mathrm{151}}^1$

素因数の和:285

約数の個数: 32

約数和(自身を含む): 28600320

約数和(自身を除く): 7171759

約数列:

[1, 7, 11, 19, 77, 97, 133, 151, 209, 679, 1057, 1067, 1463, 1661, 1843, 2869, 7469, 11627, 12901, 14647, 20083, 20273, 31559, 102529, 141911, 161117, 220913, 278293, 1127819, 1948051, 3061223, 21428561]

約数ペア:

[(1, 21428561), (7, 3061223), (11, 1948051), (19, 1127819), (77, 278293), (97, 220913), (133, 161117), (151, 141911), (209, 102529), (679, 31559), (1057, 20273), (1067, 20083), (1463, 14647), (1661, 12901), (1843, 11627), (2869, 7469)]