21448960

素因数分解:

$2^8\times 5^1\times {\mathrm{13}}^1\times {\mathrm{1289}}^1$

素因数の和:1323

約数の個数: 72

約数和(自身を含む): 55371960

約数和(自身を除く): 33923000

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 80, 104, 128, 130, 160, 208, 256, 260, 320, 416, 520, 640, 832, 1040, 1280, 1289, 1664, 2080, 2578, 3328, 4160, 5156, 6445, 8320, 10312, 12890, 16640, 16757, 20624, 25780, 33514, 41248, 51560, 67028, 82496, 83785, 103120, 134056, 164992, 167570, 206240, 268112, 329984, 335140, 412480, 536224, 670280, 824960, 1072448, 1340560, 1649920, 2144896, 2681120, 4289792, 5362240, 10724480, 21448960]

約数ペア:

[(1, 21448960), (2, 10724480), (4, 5362240), (5, 4289792), (8, 2681120), (10, 2144896), (13, 1649920), (16, 1340560), (20, 1072448), (26, 824960), (32, 670280), (40, 536224), (52, 412480), (64, 335140), (65, 329984), (80, 268112), (104, 206240), (128, 167570), (130, 164992), (160, 134056), (208, 103120), (256, 83785), (260, 82496), (320, 67028), (416, 51560), (520, 41248), (640, 33514), (832, 25780), (1040, 20624), (1280, 16757), (1289, 16640), (1664, 12890), (2080, 10312), (2578, 8320), (3328, 6445), (4160, 5156)]