21066320

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{647}}^1$

素因数の和:708

約数の個数: 80

約数和(自身を含む): 54960768

約数和(自身を除く): 33894448

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 37, 40, 44, 55, 74, 80, 88, 110, 148, 176, 185, 220, 296, 370, 407, 440, 592, 647, 740, 814, 880, 1294, 1480, 1628, 2035, 2588, 2960, 3235, 3256, 4070, 5176, 6470, 6512, 7117, 8140, 10352, 12940, 14234, 16280, 23939, 25880, 28468, 32560, 35585, 47878, 51760, 56936, 71170, 95756, 113872, 119695, 142340, 191512, 239390, 263329, 284680, 383024, 478780, 526658, 569360, 957560, 1053316, 1316645, 1915120, 2106632, 2633290, 4213264, 5266580, 10533160, 21066320]

約数ペア:

[(1, 21066320), (2, 10533160), (4, 5266580), (5, 4213264), (8, 2633290), (10, 2106632), (11, 1915120), (16, 1316645), (20, 1053316), (22, 957560), (37, 569360), (40, 526658), (44, 478780), (55, 383024), (74, 284680), (80, 263329), (88, 239390), (110, 191512), (148, 142340), (176, 119695), (185, 113872), (220, 95756), (296, 71170), (370, 56936), (407, 51760), (440, 47878), (592, 35585), (647, 32560), (740, 28468), (814, 25880), (880, 23939), (1294, 16280), (1480, 14234), (1628, 12940), (2035, 10352), (2588, 8140), (2960, 7117), (3235, 6512), (3256, 6470), (4070, 5176)]