21147665

素因数分解:

$5^1\times 7^3\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{59}}^1$

素因数の和:115

約数の個数: 64

約数和(自身を含む): 34560000

約数和(自身を除く): 13412335

約数列:

[1, 5, 7, 11, 19, 35, 49, 55, 59, 77, 95, 133, 209, 245, 295, 343, 385, 413, 539, 649, 665, 931, 1045, 1121, 1463, 1715, 2065, 2695, 2891, 3245, 3773, 4543, 4655, 5605, 6517, 7315, 7847, 10241, 12331, 14455, 18865, 20237, 22715, 31801, 32585, 39235, 51205, 54929, 61655, 71687, 86317, 101185, 159005, 222607, 274645, 358435, 384503, 431585, 604219, 1113035, 1922515, 3021095, 4229533, 21147665]

約数ペア:

[(1, 21147665), (5, 4229533), (7, 3021095), (11, 1922515), (19, 1113035), (35, 604219), (49, 431585), (55, 384503), (59, 358435), (77, 274645), (95, 222607), (133, 159005), (209, 101185), (245, 86317), (295, 71687), (343, 61655), (385, 54929), (413, 51205), (539, 39235), (649, 32585), (665, 31801), (931, 22715), (1045, 20237), (1121, 18865), (1463, 14455), (1715, 12331), (2065, 10241), (2695, 7847), (2891, 7315), (3245, 6517), (3773, 5605), (4543, 4655)]