21305530

素因数分解:

$2^1\times 5^1\times {\mathrm{389}}^1\times {\mathrm{5477}}^1$

素因数の和:5873

約数の個数: 16

約数和(自身を含む): 38455560

約数和(自身を除く): 17150030

約数列:

[1, 2, 5, 10, 389, 778, 1945, 3890, 5477, 10954, 27385, 54770, 2130553, 4261106, 10652765, 21305530]

約数ペア:

[(1, 21305530), (2, 10652765), (5, 4261106), (10, 2130553), (389, 54770), (778, 27385), (1945, 10954), (3890, 5477)]