21791385

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{331}}^1$

素因数の和:379

約数の個数: 96

約数和(自身を含む): 49720320

約数和(自身を除く): 27928935

約数列:

[1, 3, 5, 7, 9, 11, 15, 19, 21, 33, 35, 45, 55, 57, 63, 77, 95, 99, 105, 133, 165, 171, 209, 231, 285, 315, 331, 385, 399, 495, 627, 665, 693, 855, 993, 1045, 1155, 1197, 1463, 1655, 1881, 1995, 2317, 2979, 3135, 3465, 3641, 4389, 4965, 5985, 6289, 6951, 7315, 9405, 10923, 11585, 13167, 14895, 18205, 18867, 20853, 21945, 25487, 31445, 32769, 34755, 44023, 54615, 56601, 65835, 69179, 76461, 94335, 104265, 127435, 132069, 163845, 207537, 220115, 229383, 283005, 345895, 382305, 396207, 484253, 622611, 660345, 1037685, 1146915, 1452759, 1981035, 2421265, 3113055, 4358277, 7263795, 21791385]

約数ペア:

[(1, 21791385), (3, 7263795), (5, 4358277), (7, 3113055), (9, 2421265), (11, 1981035), (15, 1452759), (19, 1146915), (21, 1037685), (33, 660345), (35, 622611), (45, 484253), (55, 396207), (57, 382305), (63, 345895), (77, 283005), (95, 229383), (99, 220115), (105, 207537), (133, 163845), (165, 132069), (171, 127435), (209, 104265), (231, 94335), (285, 76461), (315, 69179), (331, 65835), (385, 56601), (399, 54615), (495, 44023), (627, 34755), (665, 32769), (693, 31445), (855, 25487), (993, 21945), (1045, 20853), (1155, 18867), (1197, 18205), (1463, 14895), (1655, 13167), (1881, 11585), (1995, 10923), (2317, 9405), (2979, 7315), (3135, 6951), (3465, 6289), (3641, 5985), (4389, 4965)]