21745503

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{107}}^1\times {\mathrm{193}}^1$

素因数の和:325

約数の個数: 40

約数和(自身を含む): 35492688

約数和(自身を除く): 13747185

約数列:

[1, 3, 9, 13, 27, 39, 81, 107, 117, 193, 321, 351, 579, 963, 1053, 1391, 1737, 2509, 2889, 4173, 5211, 7527, 8667, 12519, 15633, 20651, 22581, 37557, 61953, 67743, 112671, 185859, 203229, 268463, 557577, 805389, 1672731, 2416167, 7248501, 21745503]

約数ペア:

[(1, 21745503), (3, 7248501), (9, 2416167), (13, 1672731), (27, 805389), (39, 557577), (81, 268463), (107, 203229), (117, 185859), (193, 112671), (321, 67743), (351, 61953), (579, 37557), (963, 22581), (1053, 20651), (1391, 15633), (1737, 12519), (2509, 8667), (2889, 7527), (4173, 5211)]