18511821

素因数分解:

$3^4\times {\mathrm{449}}^1\times {\mathrm{509}}^1$

素因数の和:970

約数の個数: 20

約数和(自身を含む): 27769500

約数和(自身を除く): 9257679

約数列:

[1, 3, 9, 27, 81, 449, 509, 1347, 1527, 4041, 4581, 12123, 13743, 36369, 41229, 228541, 685623, 2056869, 6170607, 18511821]

約数ペア:

[(1, 18511821), (3, 6170607), (9, 2056869), (27, 685623), (81, 228541), (449, 41229), (509, 36369), (1347, 13743), (1527, 12123), (4041, 4581)]