21539661

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{59}}^1$

素因数の和:146

約数の個数: 64

約数和(自身を含む): 36771840

約数和(自身を除く): 15232179

約数列:

[1, 3, 11, 13, 23, 33, 37, 39, 59, 69, 111, 143, 177, 253, 299, 407, 429, 481, 649, 759, 767, 851, 897, 1221, 1357, 1443, 1947, 2183, 2301, 2553, 3289, 4071, 5291, 6549, 8437, 9361, 9867, 11063, 14927, 15873, 17641, 24013, 25311, 28083, 28379, 33189, 44781, 50209, 52923, 72039, 85137, 121693, 150627, 194051, 312169, 365079, 552299, 582153, 652717, 936507, 1656897, 1958151, 7179887, 21539661]

約数ペア:

[(1, 21539661), (3, 7179887), (11, 1958151), (13, 1656897), (23, 936507), (33, 652717), (37, 582153), (39, 552299), (59, 365079), (69, 312169), (111, 194051), (143, 150627), (177, 121693), (253, 85137), (299, 72039), (407, 52923), (429, 50209), (481, 44781), (649, 33189), (759, 28379), (767, 28083), (851, 25311), (897, 24013), (1221, 17641), (1357, 15873), (1443, 14927), (1947, 11063), (2183, 9867), (2301, 9361), (2553, 8437), (3289, 6549), (4071, 5291)]