21036800

素因数分解:

$2^8\times 5^2\times {\mathrm{19}}^1\times {\mathrm{173}}^1$

素因数の和:218

約数の個数: 108

約数和(自身を含む): 55126680

約数和(自身を除く): 34089880

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 25, 32, 38, 40, 50, 64, 76, 80, 95, 100, 128, 152, 160, 173, 190, 200, 256, 304, 320, 346, 380, 400, 475, 608, 640, 692, 760, 800, 865, 950, 1216, 1280, 1384, 1520, 1600, 1730, 1900, 2432, 2768, 3040, 3200, 3287, 3460, 3800, 4325, 4864, 5536, 6080, 6400, 6574, 6920, 7600, 8650, 11072, 12160, 13148, 13840, 15200, 16435, 17300, 22144, 24320, 26296, 27680, 30400, 32870, 34600, 44288, 52592, 55360, 60800, 65740, 69200, 82175, 105184, 110720, 121600, 131480, 138400, 164350, 210368, 221440, 262960, 276800, 328700, 420736, 525920, 553600, 657400, 841472, 1051840, 1107200, 1314800, 2103680, 2629600, 4207360, 5259200, 10518400, 21036800]

約数ペア:

[(1, 21036800), (2, 10518400), (4, 5259200), (5, 4207360), (8, 2629600), (10, 2103680), (16, 1314800), (19, 1107200), (20, 1051840), (25, 841472), (32, 657400), (38, 553600), (40, 525920), (50, 420736), (64, 328700), (76, 276800), (80, 262960), (95, 221440), (100, 210368), (128, 164350), (152, 138400), (160, 131480), (173, 121600), (190, 110720), (200, 105184), (256, 82175), (304, 69200), (320, 65740), (346, 60800), (380, 55360), (400, 52592), (475, 44288), (608, 34600), (640, 32870), (692, 30400), (760, 27680), (800, 26296), (865, 24320), (950, 22144), (1216, 17300), (1280, 16435), (1384, 15200), (1520, 13840), (1600, 13148), (1730, 12160), (1900, 11072), (2432, 8650), (2768, 7600), (3040, 6920), (3200, 6574), (3287, 6400), (3460, 6080), (3800, 5536), (4325, 4864)]