20718607

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{521}}^1$

素因数の和:583

約数の個数: 32

約数和(自身を含む): 28062720

約数和(自身を除く): 7344113

約数列:

[1, 7, 13, 19, 23, 91, 133, 161, 247, 299, 437, 521, 1729, 2093, 3059, 3647, 5681, 6773, 9899, 11983, 39767, 47411, 69293, 83881, 128687, 155779, 227677, 900809, 1090453, 1593739, 2959801, 20718607]

約数ペア:

[(1, 20718607), (7, 2959801), (13, 1593739), (19, 1090453), (23, 900809), (91, 227677), (133, 155779), (161, 128687), (247, 83881), (299, 69293), (437, 47411), (521, 39767), (1729, 11983), (2093, 9899), (3059, 6773), (3647, 5681)]