18440120

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1\times {\mathrm{151}}^1$

素因数の和:276

約数の個数: 64

約数和(自身を含む): 43338240

約数和(自身を除く): 24898120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 71, 86, 142, 151, 172, 215, 284, 302, 344, 355, 430, 568, 604, 710, 755, 860, 1208, 1420, 1510, 1720, 2840, 3020, 3053, 6040, 6106, 6493, 10721, 12212, 12986, 15265, 21442, 24424, 25972, 30530, 32465, 42884, 51944, 53605, 61060, 64930, 85768, 107210, 122120, 129860, 214420, 259720, 428840, 461003, 922006, 1844012, 2305015, 3688024, 4610030, 9220060, 18440120]

約数ペア:

[(1, 18440120), (2, 9220060), (4, 4610030), (5, 3688024), (8, 2305015), (10, 1844012), (20, 922006), (40, 461003), (43, 428840), (71, 259720), (86, 214420), (142, 129860), (151, 122120), (172, 107210), (215, 85768), (284, 64930), (302, 61060), (344, 53605), (355, 51944), (430, 42884), (568, 32465), (604, 30530), (710, 25972), (755, 24424), (860, 21442), (1208, 15265), (1420, 12986), (1510, 12212), (1720, 10721), (2840, 6493), (3020, 6106), (3053, 6040)]