21378480

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{281}}^1\times {\mathrm{317}}^1$

素因数の和:614

約数の個数: 80

約数和(自身を含む): 66718944

約数和(自身を除く): 45340464

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 240, 281, 317, 562, 634, 843, 951, 1124, 1268, 1405, 1585, 1686, 1902, 2248, 2536, 2810, 3170, 3372, 3804, 4215, 4496, 4755, 5072, 5620, 6340, 6744, 7608, 8430, 9510, 11240, 12680, 13488, 15216, 16860, 19020, 22480, 25360, 33720, 38040, 67440, 76080, 89077, 178154, 267231, 356308, 445385, 534462, 712616, 890770, 1068924, 1336155, 1425232, 1781540, 2137848, 2672310, 3563080, 4275696, 5344620, 7126160, 10689240, 21378480]

約数ペア:

[(1, 21378480), (2, 10689240), (3, 7126160), (4, 5344620), (5, 4275696), (6, 3563080), (8, 2672310), (10, 2137848), (12, 1781540), (15, 1425232), (16, 1336155), (20, 1068924), (24, 890770), (30, 712616), (40, 534462), (48, 445385), (60, 356308), (80, 267231), (120, 178154), (240, 89077), (281, 76080), (317, 67440), (562, 38040), (634, 33720), (843, 25360), (951, 22480), (1124, 19020), (1268, 16860), (1405, 15216), (1585, 13488), (1686, 12680), (1902, 11240), (2248, 9510), (2536, 8430), (2810, 7608), (3170, 6744), (3372, 6340), (3804, 5620), (4215, 5072), (4496, 4755)]