20728658

素因数分解:

$2^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{641}}^1$

素因数の和:722

約数の個数: 32

約数和(自身を含む): 35130240

約数和(自身を除く): 14401582

約数列:

[1, 2, 19, 23, 37, 38, 46, 74, 437, 641, 703, 851, 874, 1282, 1406, 1702, 12179, 14743, 16169, 23717, 24358, 29486, 32338, 47434, 280117, 450623, 545491, 560234, 901246, 1090982, 10364329, 20728658]

約数ペア:

[(1, 20728658), (2, 10364329), (19, 1090982), (23, 901246), (37, 560234), (38, 545491), (46, 450623), (74, 280117), (437, 47434), (641, 32338), (703, 29486), (851, 24358), (874, 23717), (1282, 16169), (1406, 14743), (1702, 12179)]