21157545

素因数分解:

$3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{1217}}^1$

素因数の和:1305

約数の個数: 32

約数和(自身を含む): 36247680

約数和(自身を除く): 15090135

約数列:

[1, 3, 5, 15, 19, 57, 61, 95, 183, 285, 305, 915, 1159, 1217, 3477, 3651, 5795, 6085, 17385, 18255, 23123, 69369, 74237, 115615, 222711, 346845, 371185, 1113555, 1410503, 4231509, 7052515, 21157545]

約数ペア:

[(1, 21157545), (3, 7052515), (5, 4231509), (15, 1410503), (19, 1113555), (57, 371185), (61, 346845), (95, 222711), (183, 115615), (285, 74237), (305, 69369), (915, 23123), (1159, 18255), (1217, 17385), (3477, 6085), (3651, 5795)]