21173072

素因数分解:

$2^4\times {\mathrm{67}}^1\times {\mathrm{19751}}^1$

素因数の和:19826

約数の個数: 20

約数和(自身を含む): 41637216

約数和(自身を除く): 20464144

約数列:

[1, 2, 4, 8, 16, 67, 134, 268, 536, 1072, 19751, 39502, 79004, 158008, 316016, 1323317, 2646634, 5293268, 10586536, 21173072]

約数ペア:

[(1, 21173072), (2, 10586536), (4, 5293268), (8, 2646634), (16, 1323317), (67, 316016), (134, 158008), (268, 79004), (536, 39502), (1072, 19751)]