21116553

素因数分解:

$3^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{61}}^1\times {\mathrm{173}}^1$

素因数の和:289

約数の個数: 32

約数和(自身を含む): 31069440

約数和(自身を除く): 9952887

約数列:

[1, 3, 23, 29, 61, 69, 87, 173, 183, 519, 667, 1403, 1769, 2001, 3979, 4209, 5017, 5307, 10553, 11937, 15051, 31659, 40687, 115391, 122061, 242719, 306037, 346173, 728157, 918111, 7038851, 21116553]

約数ペア:

[(1, 21116553), (3, 7038851), (23, 918111), (29, 728157), (61, 346173), (69, 306037), (87, 242719), (173, 122061), (183, 115391), (519, 40687), (667, 31659), (1403, 15051), (1769, 11937), (2001, 10553), (3979, 5307), (4209, 5017)]