21380702

素因数分解:

$2^1\times 7^1\times {\mathrm{139}}^1\times {\mathrm{10987}}^1$

素因数の和:11135

約数の個数: 16

約数和(自身を含む): 36919680

約数和(自身を除く): 15538978

約数列:

[1, 2, 7, 14, 139, 278, 973, 1946, 10987, 21974, 76909, 153818, 1527193, 3054386, 10690351, 21380702]

約数ペア:

[(1, 21380702), (2, 10690351), (7, 3054386), (14, 1527193), (139, 153818), (278, 76909), (973, 21974), (1946, 10987)]