21780712807

素因数分解:

$7^2\times {\mathrm{97}}^1\times {\mathrm{229}}^1\times {\mathrm{20011}}^1$

素因数の和:20351

約数の個数: 24

約数和(自身を含む): 25711017360

約数和(自身を除く): 3930304553

約数列:

[1, 7, 49, 97, 229, 679, 1603, 4753, 11221, 20011, 22213, 140077, 155491, 980539, 1088437, 1941067, 4582519, 13587469, 32077633, 95112283, 224543431, 444504343, 3111530401, 21780712807]

約数ペア:

[(1, 21780712807), (7, 3111530401), (49, 444504343), (97, 224543431), (229, 95112283), (679, 32077633), (1603, 13587469), (4753, 4582519), (11221, 1941067), (20011, 1088437), (22213, 980539), (140077, 155491)]