21804945

素因数分解:

$3^1\times 5^1\times {\mathrm{47}}^1\times {\mathrm{157}}^1\times {\mathrm{197}}^1$

素因数の和:409

約数の個数: 32

約数和(自身を含む): 36039168

約数和(自身を除く): 14234223

約数列:

[1, 3, 5, 15, 47, 141, 157, 197, 235, 471, 591, 705, 785, 985, 2355, 2955, 7379, 9259, 22137, 27777, 30929, 36895, 46295, 92787, 110685, 138885, 154645, 463935, 1453663, 4360989, 7268315, 21804945]

約数ペア:

[(1, 21804945), (3, 7268315), (5, 4360989), (15, 1453663), (47, 463935), (141, 154645), (157, 138885), (197, 110685), (235, 92787), (471, 46295), (591, 36895), (705, 30929), (785, 27777), (985, 22137), (2355, 9259), (2955, 7379)]