21330175

素因数分解:

$5^2\times {\mathrm{61}}^1\times {\mathrm{71}}^1\times {\mathrm{197}}^1$

素因数の和:339

約数の個数: 24

約数和(自身を含む): 27400032

約数和(自身を除く): 6069857

約数列:

[1, 5, 25, 61, 71, 197, 305, 355, 985, 1525, 1775, 4331, 4925, 12017, 13987, 21655, 60085, 69935, 108275, 300425, 349675, 853207, 4266035, 21330175]

約数ペア:

[(1, 21330175), (5, 4266035), (25, 853207), (61, 349675), (71, 300425), (197, 108275), (305, 69935), (355, 60085), (985, 21655), (1525, 13987), (1775, 12017), (4331, 4925)]