20704080

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{281}}^1\times {\mathrm{307}}^1$

素因数の和:604

約数の個数: 80

約数和(自身を含む): 64620864

約数和(自身を除く): 43916784

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 240, 281, 307, 562, 614, 843, 921, 1124, 1228, 1405, 1535, 1686, 1842, 2248, 2456, 2810, 3070, 3372, 3684, 4215, 4496, 4605, 4912, 5620, 6140, 6744, 7368, 8430, 9210, 11240, 12280, 13488, 14736, 16860, 18420, 22480, 24560, 33720, 36840, 67440, 73680, 86267, 172534, 258801, 345068, 431335, 517602, 690136, 862670, 1035204, 1294005, 1380272, 1725340, 2070408, 2588010, 3450680, 4140816, 5176020, 6901360, 10352040, 20704080]

約数ペア:

[(1, 20704080), (2, 10352040), (3, 6901360), (4, 5176020), (5, 4140816), (6, 3450680), (8, 2588010), (10, 2070408), (12, 1725340), (15, 1380272), (16, 1294005), (20, 1035204), (24, 862670), (30, 690136), (40, 517602), (48, 431335), (60, 345068), (80, 258801), (120, 172534), (240, 86267), (281, 73680), (307, 67440), (562, 36840), (614, 33720), (843, 24560), (921, 22480), (1124, 18420), (1228, 16860), (1405, 14736), (1535, 13488), (1686, 12280), (1842, 11240), (2248, 9210), (2456, 8430), (2810, 7368), (3070, 6744), (3372, 6140), (3684, 5620), (4215, 4912), (4496, 4605)]