21820215

素因数分解:

$3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{63247}}^1$

素因数の和:63278

約数の個数: 16

約数和(自身を含む): 36430848

約数和(自身を除く): 14610633

約数列:

[1, 3, 5, 15, 23, 69, 115, 345, 63247, 189741, 316235, 948705, 1454681, 4364043, 7273405, 21820215]

約数ペア:

[(1, 21820215), (3, 7273405), (5, 4364043), (15, 1454681), (23, 948705), (69, 316235), (115, 189741), (345, 63247)]