21380518

素因数分解:

$2^1\times {\mathrm{53}}^1\times {\mathrm{401}}^1\times {\mathrm{503}}^1$

素因数の和:959

約数の個数: 16

約数和(自身を含む): 32822496

約数和(自身を除く): 11441978

約数列:

[1, 2, 53, 106, 401, 503, 802, 1006, 21253, 26659, 42506, 53318, 201703, 403406, 10690259, 21380518]

約数ペア:

[(1, 21380518), (2, 10690259), (53, 403406), (106, 201703), (401, 53318), (503, 42506), (802, 26659), (1006, 21253)]