20859839

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{13}}^2\times {\mathrm{229}}^1$

素因数の和:280

約数の個数: 36

約数和(自身を含む): 28789560

約数和(自身を除く): 7929721

約数列:

[1, 7, 11, 13, 49, 77, 91, 143, 169, 229, 539, 637, 1001, 1183, 1603, 1859, 2519, 2977, 7007, 8281, 11221, 13013, 17633, 20839, 32747, 38701, 91091, 123431, 145873, 229229, 270907, 425711, 1604603, 1896349, 2979977, 20859839]

約数ペア:

[(1, 20859839), (7, 2979977), (11, 1896349), (13, 1604603), (49, 425711), (77, 270907), (91, 229229), (143, 145873), (169, 123431), (229, 91091), (539, 38701), (637, 32747), (1001, 20839), (1183, 17633), (1603, 13013), (1859, 11221), (2519, 8281), (2977, 7007)]