81671680

素因数分解:

$2^9\times 5^1\times {\mathrm{61}}^1\times {\mathrm{523}}^1$

素因数の和:607

約数の個数: 80

約数和(自身を含む): 199411344

約数和(自身を除く): 117739664

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 61, 64, 80, 122, 128, 160, 244, 256, 305, 320, 488, 512, 523, 610, 640, 976, 1046, 1220, 1280, 1952, 2092, 2440, 2560, 2615, 3904, 4184, 4880, 5230, 7808, 8368, 9760, 10460, 15616, 16736, 19520, 20920, 31232, 31903, 33472, 39040, 41840, 63806, 66944, 78080, 83680, 127612, 133888, 156160, 159515, 167360, 255224, 267776, 319030, 334720, 510448, 638060, 669440, 1020896, 1276120, 1338880, 2041792, 2552240, 4083584, 5104480, 8167168, 10208960, 16334336, 20417920, 40835840, 81671680]

約数ペア:

[(1, 81671680), (2, 40835840), (4, 20417920), (5, 16334336), (8, 10208960), (10, 8167168), (16, 5104480), (20, 4083584), (32, 2552240), (40, 2041792), (61, 1338880), (64, 1276120), (80, 1020896), (122, 669440), (128, 638060), (160, 510448), (244, 334720), (256, 319030), (305, 267776), (320, 255224), (488, 167360), (512, 159515), (523, 156160), (610, 133888), (640, 127612), (976, 83680), (1046, 78080), (1220, 66944), (1280, 63806), (1952, 41840), (2092, 39040), (2440, 33472), (2560, 31903), (2615, 31232), (3904, 20920), (4184, 19520), (4880, 16736), (5230, 15616), (7808, 10460), (8368, 9760)]