19707516

素因数分解:

$2^2\times 3^3\times {\mathrm{251}}^1\times {\mathrm{727}}^1$

素因数の和:991

約数の個数: 48

約数和(自身を含む): 51367680

約数和(自身を除く): 31660164

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 27, 36, 54, 108, 251, 502, 727, 753, 1004, 1454, 1506, 2181, 2259, 2908, 3012, 4362, 4518, 6543, 6777, 8724, 9036, 13086, 13554, 19629, 26172, 27108, 39258, 78516, 182477, 364954, 547431, 729908, 1094862, 1642293, 2189724, 3284586, 4926879, 6569172, 9853758, 19707516]

約数ペア:

[(1, 19707516), (2, 9853758), (3, 6569172), (4, 4926879), (6, 3284586), (9, 2189724), (12, 1642293), (18, 1094862), (27, 729908), (36, 547431), (54, 364954), (108, 182477), (251, 78516), (502, 39258), (727, 27108), (753, 26172), (1004, 19629), (1454, 13554), (1506, 13086), (2181, 9036), (2259, 8724), (2908, 6777), (3012, 6543), (4362, 4518)]