15381821

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{163}}^1$

素因数の和:261

約数の個数: 32

約数和(自身を含む): 20498688

約数和(自身を除く): 5116867

約数列:

[1, 7, 13, 17, 61, 91, 119, 163, 221, 427, 793, 1037, 1141, 1547, 2119, 2771, 5551, 7259, 9943, 13481, 14833, 19397, 36023, 69601, 94367, 129259, 169031, 252161, 904813, 1183217, 2197403, 15381821]

約数ペア:

[(1, 15381821), (7, 2197403), (13, 1183217), (17, 904813), (61, 252161), (91, 169031), (119, 129259), (163, 94367), (221, 69601), (427, 36023), (793, 19397), (1037, 14833), (1141, 13481), (1547, 9943), (2119, 7259), (2771, 5551)]