21206718

素因数分解:

$2^1\times 3^3\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{1777}}^1$

素因数の和:1818

約数の個数: 64

約数和(自身を含む): 53766720

約数和(自身を除く): 32560002

約数列:

[1, 2, 3, 6, 9, 13, 17, 18, 26, 27, 34, 39, 51, 54, 78, 102, 117, 153, 221, 234, 306, 351, 442, 459, 663, 702, 918, 1326, 1777, 1989, 3554, 3978, 5331, 5967, 10662, 11934, 15993, 23101, 30209, 31986, 46202, 47979, 60418, 69303, 90627, 95958, 138606, 181254, 207909, 271881, 392717, 415818, 543762, 623727, 785434, 815643, 1178151, 1247454, 1631286, 2356302, 3534453, 7068906, 10603359, 21206718]

約数ペア:

[(1, 21206718), (2, 10603359), (3, 7068906), (6, 3534453), (9, 2356302), (13, 1631286), (17, 1247454), (18, 1178151), (26, 815643), (27, 785434), (34, 623727), (39, 543762), (51, 415818), (54, 392717), (78, 271881), (102, 207909), (117, 181254), (153, 138606), (221, 95958), (234, 90627), (306, 69303), (351, 60418), (442, 47979), (459, 46202), (663, 31986), (702, 30209), (918, 23101), (1326, 15993), (1777, 11934), (1989, 10662), (3554, 5967), (3978, 5331)]