21989936

素因数分解:

$2^4\times {\mathrm{67}}^1\times {\mathrm{73}}^1\times {\mathrm{281}}^1$

素因数の和:429

約数の個数: 40

約数和(自身を含む): 43989744

約数和(自身を除く): 21999808

約数列:

[1, 2, 4, 8, 16, 67, 73, 134, 146, 268, 281, 292, 536, 562, 584, 1072, 1124, 1168, 2248, 4496, 4891, 9782, 18827, 19564, 20513, 37654, 39128, 41026, 75308, 78256, 82052, 150616, 164104, 301232, 328208, 1374371, 2748742, 5497484, 10994968, 21989936]

約数ペア:

[(1, 21989936), (2, 10994968), (4, 5497484), (8, 2748742), (16, 1374371), (67, 328208), (73, 301232), (134, 164104), (146, 150616), (268, 82052), (281, 78256), (292, 75308), (536, 41026), (562, 39128), (584, 37654), (1072, 20513), (1124, 19564), (1168, 18827), (2248, 9782), (4496, 4891)]