19881982

素因数分解:

$2^1\times {\mathrm{23}}^1\times {\mathrm{67}}^1\times {\mathrm{6451}}^1$

素因数の和:6543

約数の個数: 16

約数和(自身を含む): 31588992

約数和(自身を除く): 11707010

約数列:

[1, 2, 23, 46, 67, 134, 1541, 3082, 6451, 12902, 148373, 296746, 432217, 864434, 9940991, 19881982]

約数ペア:

[(1, 19881982), (2, 9940991), (23, 864434), (46, 432217), (67, 296746), (134, 148373), (1541, 12902), (3082, 6451)]