1215678821

素因数分解:

$7^1\times {\mathrm{61}}^1\times {\mathrm{103}}^1\times {\mathrm{131}}^1\times {\mathrm{211}}^1$

素因数の和:513

約数の個数: 32

約数和(自身を含む): 1443526656

約数和(自身を除く): 227847835

約数列:

[1, 7, 61, 103, 131, 211, 427, 721, 917, 1477, 6283, 7991, 12871, 13493, 21733, 27641, 43981, 55937, 90097, 94451, 152131, 193487, 823073, 1325713, 1686101, 2847023, 5761511, 9279991, 11802707, 19929161, 173668403, 1215678821]

約数ペア:

[(1, 1215678821), (7, 173668403), (61, 19929161), (103, 11802707), (131, 9279991), (211, 5761511), (427, 2847023), (721, 1686101), (917, 1325713), (1477, 823073), (6283, 193487), (7991, 152131), (12871, 94451), (13493, 90097), (21733, 55937), (27641, 43981)]