19809951

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{131}}^1\times {\mathrm{379}}^1$

素因数の和:539

約数の個数: 32

約数和(自身を含む): 32102400

約数和(自身を除く): 12292449

約数列:

[1, 3, 7, 19, 21, 57, 131, 133, 379, 393, 399, 917, 1137, 2489, 2653, 2751, 7201, 7467, 7959, 17423, 21603, 49649, 50407, 52269, 148947, 151221, 347543, 943331, 1042629, 2829993, 6603317, 19809951]

約数ペア:

[(1, 19809951), (3, 6603317), (7, 2829993), (19, 1042629), (21, 943331), (57, 347543), (131, 151221), (133, 148947), (379, 52269), (393, 50407), (399, 49649), (917, 21603), (1137, 17423), (2489, 7959), (2653, 7467), (2751, 7201)]