21981561

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{67}}^1\times {\mathrm{919}}^1$

素因数の和:1013

約数の個数: 32

約数和(自身を含む): 36034560

約数和(自身を除く): 14052999

約数列:

[1, 3, 7, 17, 21, 51, 67, 119, 201, 357, 469, 919, 1139, 1407, 2757, 3417, 6433, 7973, 15623, 19299, 23919, 46869, 61573, 109361, 184719, 328083, 431011, 1046741, 1293033, 3140223, 7327187, 21981561]

約数ペア:

[(1, 21981561), (3, 7327187), (7, 3140223), (17, 1293033), (21, 1046741), (51, 431011), (67, 328083), (119, 184719), (201, 109361), (357, 61573), (469, 46869), (919, 23919), (1139, 19299), (1407, 15623), (2757, 7973), (3417, 6433)]