19994805

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{59}}^1\times {\mathrm{443}}^1$

素因数の和:530

約数の個数: 48

約数和(自身を含む): 37402560

約数和(自身を除く): 17407755

約数列:

[1, 3, 5, 9, 15, 17, 45, 51, 59, 85, 153, 177, 255, 295, 443, 531, 765, 885, 1003, 1329, 2215, 2655, 3009, 3987, 5015, 6645, 7531, 9027, 15045, 19935, 22593, 26137, 37655, 45135, 67779, 78411, 112965, 130685, 235233, 338895, 392055, 444329, 1176165, 1332987, 2221645, 3998961, 6664935, 19994805]

約数ペア:

[(1, 19994805), (3, 6664935), (5, 3998961), (9, 2221645), (15, 1332987), (17, 1176165), (45, 444329), (51, 392055), (59, 338895), (85, 235233), (153, 130685), (177, 112965), (255, 78411), (295, 67779), (443, 45135), (531, 37655), (765, 26137), (885, 22593), (1003, 19935), (1329, 15045), (2215, 9027), (2655, 7531), (3009, 6645), (3987, 5015)]