20405812

素因数分解:

$2^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{23509}}^1$

素因数の和:23551

約数の個数: 24

約数和(自身を含む): 42129920

約数和(自身を除く): 21724108

約数列:

[1, 2, 4, 7, 14, 28, 31, 62, 124, 217, 434, 868, 23509, 47018, 94036, 164563, 329126, 658252, 728779, 1457558, 2915116, 5101453, 10202906, 20405812]

約数ペア:

[(1, 20405812), (2, 10202906), (4, 5101453), (7, 2915116), (14, 1457558), (28, 728779), (31, 658252), (62, 329126), (124, 164563), (217, 94036), (434, 47018), (868, 23509)]