20881638

素因数分解:

$2^1\times 3^4\times {\mathrm{83}}^1\times {\mathrm{1553}}^1$

素因数の和:1650

約数の個数: 40

約数和(自身を含む): 47384568

約数和(自身を除く): 26502930

約数列:

[1, 2, 3, 6, 9, 18, 27, 54, 81, 83, 162, 166, 249, 498, 747, 1494, 1553, 2241, 3106, 4482, 4659, 6723, 9318, 13446, 13977, 27954, 41931, 83862, 125793, 128899, 251586, 257798, 386697, 773394, 1160091, 2320182, 3480273, 6960546, 10440819, 20881638]

約数ペア:

[(1, 20881638), (2, 10440819), (3, 6960546), (6, 3480273), (9, 2320182), (18, 1160091), (27, 773394), (54, 386697), (81, 257798), (83, 251586), (162, 128899), (166, 125793), (249, 83862), (498, 41931), (747, 27954), (1494, 13977), (1553, 13446), (2241, 9318), (3106, 6723), (4482, 4659)]