21557789144

素因数分解:

$2^3\times {\mathrm{16381}}^1\times {\mathrm{164503}}^1$

素因数の和:180890

約数の個数: 16

約数和(自身を含む): 40423567920

約数和(自身を除く): 18865778776

約数列:

[1, 2, 4, 8, 16381, 32762, 65524, 131048, 164503, 329006, 658012, 1316024, 2694723643, 5389447286, 10778894572, 21557789144]

約数ペア:

[(1, 21557789144), (2, 10778894572), (4, 5389447286), (8, 2694723643), (16381, 1316024), (32762, 658012), (65524, 329006), (131048, 164503)]