21688144

素因数分解:

$2^4\times {\mathrm{181}}^1\times {\mathrm{7489}}^1$

素因数の和:7678

約数の個数: 20

約数和(自身を含む): 42258580

約数和(自身を除く): 20570436

約数列:

[1, 2, 4, 8, 16, 181, 362, 724, 1448, 2896, 7489, 14978, 29956, 59912, 119824, 1355509, 2711018, 5422036, 10844072, 21688144]

約数ペア:

[(1, 21688144), (2, 10844072), (4, 5422036), (8, 2711018), (16, 1355509), (181, 119824), (362, 59912), (724, 29956), (1448, 14978), (2896, 7489)]