19987812

素因数分解:

$2^2\times 3^2\times {\mathrm{13}}^1\times {\mathrm{42709}}^1$

素因数の和:42732

約数の個数: 36

約数和(自身を含む): 54412540

約数和(自身を除く): 34424728

約数列:

[1, 2, 3, 4, 6, 9, 12, 13, 18, 26, 36, 39, 52, 78, 117, 156, 234, 468, 42709, 85418, 128127, 170836, 256254, 384381, 512508, 555217, 768762, 1110434, 1537524, 1665651, 2220868, 3331302, 4996953, 6662604, 9993906, 19987812]

約数ペア:

[(1, 19987812), (2, 9993906), (3, 6662604), (4, 4996953), (6, 3331302), (9, 2220868), (12, 1665651), (13, 1537524), (18, 1110434), (26, 768762), (36, 555217), (39, 512508), (52, 384381), (78, 256254), (117, 170836), (156, 128127), (234, 85418), (468, 42709)]