21205678

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{35461}}^1$

素因数の和:35499

約数の個数: 16

約数和(自身を含む): 35745696

約数和(自身を除く): 14540018

約数列:

[1, 2, 13, 23, 26, 46, 299, 598, 35461, 70922, 460993, 815603, 921986, 1631206, 10602839, 21205678]

約数ペア:

[(1, 21205678), (2, 10602839), (13, 1631206), (23, 921986), (26, 815603), (46, 460993), (299, 70922), (598, 35461)]