654328720

素因数分解:

$2^4\times 5^1\times {\mathrm{37}}^1\times {\mathrm{443}}^1\times {\mathrm{499}}^1$

素因数の和:992

約数の個数: 80

約数和(自身を含む): 1569096000

約数和(自身を除く): 914767280

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 37, 40, 74, 80, 148, 185, 296, 370, 443, 499, 592, 740, 886, 998, 1480, 1772, 1996, 2215, 2495, 2960, 3544, 3992, 4430, 4990, 7088, 7984, 8860, 9980, 16391, 17720, 18463, 19960, 32782, 35440, 36926, 39920, 65564, 73852, 81955, 92315, 131128, 147704, 163910, 184630, 221057, 262256, 295408, 327820, 369260, 442114, 655640, 738520, 884228, 1105285, 1311280, 1477040, 1768456, 2210570, 3536912, 4421140, 8179109, 8842280, 16358218, 17684560, 32716436, 40895545, 65432872, 81791090, 130865744, 163582180, 327164360, 654328720]

約数ペア:

[(1, 654328720), (2, 327164360), (4, 163582180), (5, 130865744), (8, 81791090), (10, 65432872), (16, 40895545), (20, 32716436), (37, 17684560), (40, 16358218), (74, 8842280), (80, 8179109), (148, 4421140), (185, 3536912), (296, 2210570), (370, 1768456), (443, 1477040), (499, 1311280), (592, 1105285), (740, 884228), (886, 738520), (998, 655640), (1480, 442114), (1772, 369260), (1996, 327820), (2215, 295408), (2495, 262256), (2960, 221057), (3544, 184630), (3992, 163910), (4430, 147704), (4990, 131128), (7088, 92315), (7984, 81955), (8860, 73852), (9980, 65564), (16391, 39920), (17720, 36926), (18463, 35440), (19960, 32782)]