199717721

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{103}}^1\times {\mathrm{239}}^1$

素因数の和:429

約数の個数: 32

約数和(自身を含む): 247603200

約数和(自身を除く): 47885479

約数列:

[1, 7, 19, 61, 103, 133, 239, 427, 721, 1159, 1673, 1957, 4541, 6283, 8113, 13699, 14579, 24617, 31787, 43981, 102053, 119377, 172319, 277001, 467723, 835639, 1501637, 1939007, 3274061, 10511459, 28531103, 199717721]

約数ペア:

[(1, 199717721), (7, 28531103), (19, 10511459), (61, 3274061), (103, 1939007), (133, 1501637), (239, 835639), (427, 467723), (721, 277001), (1159, 172319), (1673, 119377), (1957, 102053), (4541, 43981), (6283, 31787), (8113, 24617), (13699, 14579)]