21328136

素因数分解:

$2^3\times {\mathrm{157}}^1\times {\mathrm{16981}}^1$

素因数の和:17144

約数の個数: 16

約数和(自身を含む): 40247340

約数和(自身を除く): 18919204

約数列:

[1, 2, 4, 8, 157, 314, 628, 1256, 16981, 33962, 67924, 135848, 2666017, 5332034, 10664068, 21328136]

約数ペア:

[(1, 21328136), (2, 10664068), (4, 5332034), (8, 2666017), (157, 135848), (314, 67924), (628, 33962), (1256, 16981)]