21909180

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{37}}^1\times {\mathrm{71}}^1\times {\mathrm{139}}^1$

素因数の和:259

約数の個数: 96

約数和(自身を含む): 64350720

約数和(自身を除く): 42441540

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 37, 60, 71, 74, 111, 139, 142, 148, 185, 213, 222, 278, 284, 355, 370, 417, 426, 444, 555, 556, 695, 710, 740, 834, 852, 1065, 1110, 1390, 1420, 1668, 2085, 2130, 2220, 2627, 2780, 4170, 4260, 5143, 5254, 7881, 8340, 9869, 10286, 10508, 13135, 15429, 15762, 19738, 20572, 25715, 26270, 29607, 30858, 31524, 39405, 39476, 49345, 51430, 52540, 59214, 61716, 77145, 78810, 98690, 102860, 118428, 148035, 154290, 157620, 197380, 296070, 308580, 365153, 592140, 730306, 1095459, 1460612, 1825765, 2190918, 3651530, 4381836, 5477295, 7303060, 10954590, 21909180]

約数ペア:

[(1, 21909180), (2, 10954590), (3, 7303060), (4, 5477295), (5, 4381836), (6, 3651530), (10, 2190918), (12, 1825765), (15, 1460612), (20, 1095459), (30, 730306), (37, 592140), (60, 365153), (71, 308580), (74, 296070), (111, 197380), (139, 157620), (142, 154290), (148, 148035), (185, 118428), (213, 102860), (222, 98690), (278, 78810), (284, 77145), (355, 61716), (370, 59214), (417, 52540), (426, 51430), (444, 49345), (555, 39476), (556, 39405), (695, 31524), (710, 30858), (740, 29607), (834, 26270), (852, 25715), (1065, 20572), (1110, 19738), (1390, 15762), (1420, 15429), (1668, 13135), (2085, 10508), (2130, 10286), (2220, 9869), (2627, 8340), (2780, 7881), (4170, 5254), (4260, 5143)]