21171418

素因数分解:

$2^1\times {\mathrm{101}}^1\times {\mathrm{163}}^1\times {\mathrm{643}}^1$

素因数の和:909

約数の個数: 16

約数和(自身を含む): 32318496

約数和(自身を除く): 11147078

約数列:

[1, 2, 101, 163, 202, 326, 643, 1286, 16463, 32926, 64943, 104809, 129886, 209618, 10585709, 21171418]

約数ペア:

[(1, 21171418), (2, 10585709), (101, 209618), (163, 129886), (202, 104809), (326, 64943), (643, 32926), (1286, 16463)]