21206661

素因数分解:

$3^1\times 7^3\times {\mathrm{37}}^1\times {\mathrm{557}}^1$

素因数の和:618

約数の個数: 32

約数和(自身を含む): 33926400

約数和(自身を除く): 12719739

約数列:

[1, 3, 7, 21, 37, 49, 111, 147, 259, 343, 557, 777, 1029, 1671, 1813, 3899, 5439, 11697, 12691, 20609, 27293, 38073, 61827, 81879, 144263, 191051, 432789, 573153, 1009841, 3029523, 7068887, 21206661]

約数ペア:

[(1, 21206661), (3, 7068887), (7, 3029523), (21, 1009841), (37, 573153), (49, 432789), (111, 191051), (147, 144263), (259, 81879), (343, 61827), (557, 38073), (777, 27293), (1029, 20609), (1671, 12691), (1813, 11697), (3899, 5439)]