20531855

素因数分解:

$5^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{89}}^1$

素因数の和:203

約数の個数: 32

約数和(自身を含む): 27086400

約数和(自身を除く): 6554545

約数列:

[1, 5, 29, 37, 43, 89, 145, 185, 215, 445, 1073, 1247, 1591, 2581, 3293, 3827, 5365, 6235, 7955, 12905, 16465, 19135, 46139, 95497, 110983, 141599, 230695, 477485, 554915, 707995, 4106371, 20531855]

約数ペア:

[(1, 20531855), (5, 4106371), (29, 707995), (37, 554915), (43, 477485), (89, 230695), (145, 141599), (185, 110983), (215, 95497), (445, 46139), (1073, 19135), (1247, 16465), (1591, 12905), (2581, 7955), (3293, 6235), (3827, 5365)]