21639680

素因数分解:

$2^9\times 5^1\times {\mathrm{79}}^1\times {\mathrm{107}}^1$

素因数の和:209

約数の個数: 80

約数和(自身を含む): 53032320

約数和(自身を除く): 31392640

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 79, 80, 107, 128, 158, 160, 214, 256, 316, 320, 395, 428, 512, 535, 632, 640, 790, 856, 1070, 1264, 1280, 1580, 1712, 2140, 2528, 2560, 3160, 3424, 4280, 5056, 6320, 6848, 8453, 8560, 10112, 12640, 13696, 16906, 17120, 20224, 25280, 27392, 33812, 34240, 40448, 42265, 50560, 54784, 67624, 68480, 84530, 101120, 135248, 136960, 169060, 202240, 270496, 273920, 338120, 540992, 676240, 1081984, 1352480, 2163968, 2704960, 4327936, 5409920, 10819840, 21639680]

約数ペア:

[(1, 21639680), (2, 10819840), (4, 5409920), (5, 4327936), (8, 2704960), (10, 2163968), (16, 1352480), (20, 1081984), (32, 676240), (40, 540992), (64, 338120), (79, 273920), (80, 270496), (107, 202240), (128, 169060), (158, 136960), (160, 135248), (214, 101120), (256, 84530), (316, 68480), (320, 67624), (395, 54784), (428, 50560), (512, 42265), (535, 40448), (632, 34240), (640, 33812), (790, 27392), (856, 25280), (1070, 20224), (1264, 17120), (1280, 16906), (1580, 13696), (1712, 12640), (2140, 10112), (2528, 8560), (2560, 8453), (3160, 6848), (3424, 6320), (4280, 5056)]