20118721

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{139}}^1$

素因数の和:229

約数の個数: 32

約数和(自身を含む): 25804800

約数和(自身を除く): 5686079

約数列:

[1, 7, 23, 29, 31, 139, 161, 203, 217, 667, 713, 899, 973, 3197, 4031, 4309, 4669, 4991, 6293, 20677, 22379, 28217, 30163, 92713, 99107, 124961, 144739, 648991, 693749, 874727, 2874103, 20118721]

約数ペア:

[(1, 20118721), (7, 2874103), (23, 874727), (29, 693749), (31, 648991), (139, 144739), (161, 124961), (203, 99107), (217, 92713), (667, 30163), (713, 28217), (899, 22379), (973, 20677), (3197, 6293), (4031, 4991), (4309, 4669)]