20381991

素因数分解:

$3^1\times 7^2\times {\mathrm{61}}^1\times {\mathrm{2273}}^1$

素因数の和:2351

約数の個数: 24

約数和(自身を含む): 32145264

約数和(自身を除く): 11763273

約数列:

[1, 3, 7, 21, 49, 61, 147, 183, 427, 1281, 2273, 2989, 6819, 8967, 15911, 47733, 111377, 138653, 334131, 415959, 970571, 2911713, 6793997, 20381991]

約数ペア:

[(1, 20381991), (3, 6793997), (7, 2911713), (21, 970571), (49, 415959), (61, 334131), (147, 138653), (183, 111377), (427, 47733), (1281, 15911), (2273, 8967), (2989, 6819)]