21989219

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{61}}^1\times {\mathrm{2239}}^1$

素因数の和:2330

約数の個数: 16

約数和(自身を含む): 26664960

約数和(自身を除く): 4675741

約数列:

[1, 7, 23, 61, 161, 427, 1403, 2239, 9821, 15673, 51497, 136579, 360479, 956053, 3141317, 21989219]

約数ペア:

[(1, 21989219), (7, 3141317), (23, 956053), (61, 360479), (161, 136579), (427, 51497), (1403, 15673), (2239, 9821)]