19719775

素因数分解:

$5^2\times {\mathrm{61}}^1\times {\mathrm{67}}^1\times {\mathrm{193}}^1$

素因数の和:331

約数の個数: 24

約数和(自身を含む): 25355024

約数和(自身を除く): 5635249

約数列:

[1, 5, 25, 61, 67, 193, 305, 335, 965, 1525, 1675, 4087, 4825, 11773, 12931, 20435, 58865, 64655, 102175, 294325, 323275, 788791, 3943955, 19719775]

約数ペア:

[(1, 19719775), (5, 3943955), (25, 788791), (61, 323275), (67, 294325), (193, 102175), (305, 64655), (335, 58865), (965, 20435), (1525, 12931), (1675, 11773), (4087, 4825)]