21509782

素因数分解:

$2^1\times 7^1\times {\mathrm{83}}^1\times {\mathrm{107}}^1\times {\mathrm{173}}^1$

素因数の和:372

約数の個数: 32

約数和(自身を含む): 37884672

約数和(自身を除く): 16374890

約数列:

[1, 2, 7, 14, 83, 107, 166, 173, 214, 346, 581, 749, 1162, 1211, 1498, 2422, 8881, 14359, 17762, 18511, 28718, 37022, 62167, 100513, 124334, 129577, 201026, 259154, 1536413, 3072826, 10754891, 21509782]

約数ペア:

[(1, 21509782), (2, 10754891), (7, 3072826), (14, 1536413), (83, 259154), (107, 201026), (166, 129577), (173, 124334), (214, 100513), (346, 62167), (581, 37022), (749, 28718), (1162, 18511), (1211, 17762), (1498, 14359), (2422, 8881)]