20883261

素因数分解:

$3^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{7477}}^1$

素因数の和:7513

約数の個数: 24

約数和(自身を含む): 34099680

約数和(自身を除く): 13216419

約数列:

[1, 3, 7, 19, 21, 49, 57, 133, 147, 399, 931, 2793, 7477, 22431, 52339, 142063, 157017, 366373, 426189, 994441, 1099119, 2983323, 6961087, 20883261]

約数ペア:

[(1, 20883261), (3, 6961087), (7, 2983323), (19, 1099119), (21, 994441), (49, 426189), (57, 366373), (133, 157017), (147, 142063), (399, 52339), (931, 22431), (2793, 7477)]