21006153

素因数分解:

$3^2\times 7^2\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{109}}^1$

素因数の和:171

約数の個数: 72

約数和(自身を含む): 39124800

約数和(自身を除く): 18118647

約数列:

[1, 3, 7, 9, 19, 21, 23, 49, 57, 63, 69, 109, 133, 147, 161, 171, 207, 327, 399, 437, 441, 483, 763, 931, 981, 1127, 1197, 1311, 1449, 2071, 2289, 2507, 2793, 3059, 3381, 3933, 5341, 6213, 6867, 7521, 8379, 9177, 10143, 14497, 16023, 17549, 18639, 21413, 22563, 27531, 43491, 47633, 48069, 52647, 64239, 101479, 122843, 130473, 142899, 157941, 192717, 304437, 333431, 368529, 428697, 913311, 1000293, 1105587, 2334017, 3000879, 7002051, 21006153]

約数ペア:

[(1, 21006153), (3, 7002051), (7, 3000879), (9, 2334017), (19, 1105587), (21, 1000293), (23, 913311), (49, 428697), (57, 368529), (63, 333431), (69, 304437), (109, 192717), (133, 157941), (147, 142899), (161, 130473), (171, 122843), (207, 101479), (327, 64239), (399, 52647), (437, 48069), (441, 47633), (483, 43491), (763, 27531), (931, 22563), (981, 21413), (1127, 18639), (1197, 17549), (1311, 16023), (1449, 14497), (2071, 10143), (2289, 9177), (2507, 8379), (2793, 7521), (3059, 6867), (3381, 6213), (3933, 5341)]