20828223

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{2657}}^1$

素因数の和:2743

約数の個数: 24

約数和(自身を含む): 32895408

約数和(自身を除く): 12067185

約数列:

[1, 3, 9, 13, 39, 67, 117, 201, 603, 871, 2613, 2657, 7839, 7971, 23913, 34541, 103623, 178019, 310869, 534057, 1602171, 2314247, 6942741, 20828223]

約数ペア:

[(1, 20828223), (3, 6942741), (9, 2314247), (13, 1602171), (39, 534057), (67, 310869), (117, 178019), (201, 103623), (603, 34541), (871, 23913), (2613, 7971), (2657, 7839)]