19876805

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{71}}^1\times {\mathrm{73}}^1$

素因数の和:221

約数の個数: 32

約数和(自身を含む): 26853120

約数和(自身を除く): 6976315

約数列:

[1, 5, 13, 59, 65, 71, 73, 295, 355, 365, 767, 923, 949, 3835, 4189, 4307, 4615, 4745, 5183, 20945, 21535, 25915, 54457, 55991, 67379, 272285, 279955, 305797, 336895, 1528985, 3975361, 19876805]

約数ペア:

[(1, 19876805), (5, 3975361), (13, 1528985), (59, 336895), (65, 305797), (71, 279955), (73, 272285), (295, 67379), (355, 55991), (365, 54457), (767, 25915), (923, 21535), (949, 20945), (3835, 5183), (4189, 4745), (4307, 4615)]