19699888

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{1787}}^1$

素因数の和:1861

約数の個数: 40

約数和(自身を含む): 41903568

約数和(自身を除く): 22203680

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 53, 104, 106, 208, 212, 424, 689, 848, 1378, 1787, 2756, 3574, 5512, 7148, 11024, 14296, 23231, 28592, 46462, 92924, 94711, 185848, 189422, 371696, 378844, 757688, 1231243, 1515376, 2462486, 4924972, 9849944, 19699888]

約数ペア:

[(1, 19699888), (2, 9849944), (4, 4924972), (8, 2462486), (13, 1515376), (16, 1231243), (26, 757688), (52, 378844), (53, 371696), (104, 189422), (106, 185848), (208, 94711), (212, 92924), (424, 46462), (689, 28592), (848, 23231), (1378, 14296), (1787, 11024), (2756, 7148), (3574, 5512)]