19977584

素因数分解:

$2^4\times {\mathrm{11}}^2\times {\mathrm{17}}^1\times {\mathrm{607}}^1$

素因数の和:654

約数の個数: 60

約数和(自身を含む): 45122112

約数和(自身を除く): 25144528

約数列:

[1, 2, 4, 8, 11, 16, 17, 22, 34, 44, 68, 88, 121, 136, 176, 187, 242, 272, 374, 484, 607, 748, 968, 1214, 1496, 1936, 2057, 2428, 2992, 4114, 4856, 6677, 8228, 9712, 10319, 13354, 16456, 20638, 26708, 32912, 41276, 53416, 73447, 82552, 106832, 113509, 146894, 165104, 227018, 293788, 454036, 587576, 908072, 1175152, 1248599, 1816144, 2497198, 4994396, 9988792, 19977584]

約数ペア:

[(1, 19977584), (2, 9988792), (4, 4994396), (8, 2497198), (11, 1816144), (16, 1248599), (17, 1175152), (22, 908072), (34, 587576), (44, 454036), (68, 293788), (88, 227018), (121, 165104), (136, 146894), (176, 113509), (187, 106832), (242, 82552), (272, 73447), (374, 53416), (484, 41276), (607, 32912), (748, 26708), (968, 20638), (1214, 16456), (1496, 13354), (1936, 10319), (2057, 9712), (2428, 8228), (2992, 6677), (4114, 4856)]