19963503

素因数分解:

$3^4\times 7^1\times {\mathrm{137}}^1\times {\mathrm{257}}^1$

素因数の和:413

約数の個数: 40

約数和(自身を含む): 34464672

約数和(自身を除く): 14501169

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 137, 189, 257, 411, 567, 771, 959, 1233, 1799, 2313, 2877, 3699, 5397, 6939, 8631, 11097, 16191, 20817, 25893, 35209, 48573, 77679, 105627, 145719, 246463, 316881, 739389, 950643, 2218167, 2851929, 6654501, 19963503]

約数ペア:

[(1, 19963503), (3, 6654501), (7, 2851929), (9, 2218167), (21, 950643), (27, 739389), (63, 316881), (81, 246463), (137, 145719), (189, 105627), (257, 77679), (411, 48573), (567, 35209), (771, 25893), (959, 20817), (1233, 16191), (1799, 11097), (2313, 8631), (2877, 6939), (3699, 5397)]