20891949

素因数分解:

$3^1\times {\mathrm{13}}^2\times {\mathrm{89}}^1\times {\mathrm{463}}^1$

素因数の和:581

約数の個数: 24

約数和(自身を含む): 30568320

約数和(自身を除く): 9676371

約数列:

[1, 3, 13, 39, 89, 169, 267, 463, 507, 1157, 1389, 3471, 6019, 15041, 18057, 41207, 45123, 78247, 123621, 234741, 535691, 1607073, 6963983, 20891949]

約数ペア:

[(1, 20891949), (3, 6963983), (13, 1607073), (39, 535691), (89, 234741), (169, 123621), (267, 78247), (463, 45123), (507, 41207), (1157, 18057), (1389, 15041), (3471, 6019)]