81214720

素因数分解:

$2^8\times 5^1\times {\mathrm{67}}^1\times {\mathrm{947}}^1$

素因数の和:1035

約数の個数: 72

約数和(自身を含む): 197646624

約数和(自身を除く): 116431904

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 67, 80, 128, 134, 160, 256, 268, 320, 335, 536, 640, 670, 947, 1072, 1280, 1340, 1894, 2144, 2680, 3788, 4288, 4735, 5360, 7576, 8576, 9470, 10720, 15152, 17152, 18940, 21440, 30304, 37880, 42880, 60608, 63449, 75760, 85760, 121216, 126898, 151520, 242432, 253796, 303040, 317245, 507592, 606080, 634490, 1015184, 1212160, 1268980, 2030368, 2537960, 4060736, 5075920, 8121472, 10151840, 16242944, 20303680, 40607360, 81214720]

約数ペア:

[(1, 81214720), (2, 40607360), (4, 20303680), (5, 16242944), (8, 10151840), (10, 8121472), (16, 5075920), (20, 4060736), (32, 2537960), (40, 2030368), (64, 1268980), (67, 1212160), (80, 1015184), (128, 634490), (134, 606080), (160, 507592), (256, 317245), (268, 303040), (320, 253796), (335, 242432), (536, 151520), (640, 126898), (670, 121216), (947, 85760), (1072, 75760), (1280, 63449), (1340, 60608), (1894, 42880), (2144, 37880), (2680, 30304), (3788, 21440), (4288, 18940), (4735, 17152), (5360, 15152), (7576, 10720), (8576, 9470)]