19968988

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{4861}}^1$

素因数の和:4957

約数の個数: 24

約数和(自身を含む): 38118080

約数和(自身を除く): 18149092

約数列:

[1, 2, 4, 13, 26, 52, 79, 158, 316, 1027, 2054, 4108, 4861, 9722, 19444, 63193, 126386, 252772, 384019, 768038, 1536076, 4992247, 9984494, 19968988]

約数ペア:

[(1, 19968988), (2, 9984494), (4, 4992247), (13, 1536076), (26, 768038), (52, 384019), (79, 252772), (158, 126386), (316, 63193), (1027, 19444), (2054, 9722), (4108, 4861)]