21691605

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{173}}^1\times {\mathrm{643}}^1$

素因数の和:837

約数の個数: 32

約数和(自身を含む): 37650816

約数和(自身を除く): 15959211

約数列:

[1, 3, 5, 13, 15, 39, 65, 173, 195, 519, 643, 865, 1929, 2249, 2595, 3215, 6747, 8359, 9645, 11245, 25077, 33735, 41795, 111239, 125385, 333717, 556195, 1446107, 1668585, 4338321, 7230535, 21691605]

約数ペア:

[(1, 21691605), (3, 7230535), (5, 4338321), (13, 1668585), (15, 1446107), (39, 556195), (65, 333717), (173, 125385), (195, 111239), (519, 41795), (643, 33735), (865, 25077), (1929, 11245), (2249, 9645), (2595, 8359), (3215, 6747)]