19418828

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{1997}}^1$

素因数の和:2042

約数の個数: 48

約数和(自身を含む): 42293664

約数和(自身を除く): 22874836

約数列:

[1, 2, 4, 11, 13, 17, 22, 26, 34, 44, 52, 68, 143, 187, 221, 286, 374, 442, 572, 748, 884, 1997, 2431, 3994, 4862, 7988, 9724, 21967, 25961, 33949, 43934, 51922, 67898, 87868, 103844, 135796, 285571, 373439, 441337, 571142, 746878, 882674, 1142284, 1493756, 1765348, 4854707, 9709414, 19418828]

約数ペア:

[(1, 19418828), (2, 9709414), (4, 4854707), (11, 1765348), (13, 1493756), (17, 1142284), (22, 882674), (26, 746878), (34, 571142), (44, 441337), (52, 373439), (68, 285571), (143, 135796), (187, 103844), (221, 87868), (286, 67898), (374, 51922), (442, 43934), (572, 33949), (748, 25961), (884, 21967), (1997, 9724), (2431, 7988), (3994, 4862)]