21663928

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{653}}^1$

素因数の和:712

約数の個数: 64

約数和(自身を含む): 49442400

約数和(自身を除く): 27778472

約数列:

[1, 2, 4, 8, 11, 13, 22, 26, 29, 44, 52, 58, 88, 104, 116, 143, 232, 286, 319, 377, 572, 638, 653, 754, 1144, 1276, 1306, 1508, 2552, 2612, 3016, 4147, 5224, 7183, 8294, 8489, 14366, 16588, 16978, 18937, 28732, 33176, 33956, 37874, 57464, 67912, 75748, 93379, 151496, 186758, 208307, 246181, 373516, 416614, 492362, 747032, 833228, 984724, 1666456, 1969448, 2707991, 5415982, 10831964, 21663928]

約数ペア:

[(1, 21663928), (2, 10831964), (4, 5415982), (8, 2707991), (11, 1969448), (13, 1666456), (22, 984724), (26, 833228), (29, 747032), (44, 492362), (52, 416614), (58, 373516), (88, 246181), (104, 208307), (116, 186758), (143, 151496), (232, 93379), (286, 75748), (319, 67912), (377, 57464), (572, 37874), (638, 33956), (653, 33176), (754, 28732), (1144, 18937), (1276, 16978), (1306, 16588), (1508, 14366), (2552, 8489), (2612, 8294), (3016, 7183), (4147, 5224)]