21871367

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{61}}^1\times {\mathrm{131}}^1$

素因数の和:239

約数の個数: 32

約数和(自身を含む): 28283904

約数和(自身を除く): 6412537

約数列:

[1, 7, 17, 23, 61, 119, 131, 161, 391, 427, 917, 1037, 1403, 2227, 2737, 3013, 7259, 7991, 9821, 15589, 21091, 23851, 51221, 55937, 135847, 166957, 183793, 358547, 950929, 1286551, 3124481, 21871367]

約数ペア:

[(1, 21871367), (7, 3124481), (17, 1286551), (23, 950929), (61, 358547), (119, 183793), (131, 166957), (161, 135847), (391, 55937), (427, 51221), (917, 23851), (1037, 21091), (1403, 15589), (2227, 9821), (2737, 7991), (3013, 7259)]