19981647

素因数分解:

$3^5\times 7^1\times {\mathrm{17}}^1\times {\mathrm{691}}^1$

素因数の和:730

約数の個数: 48

約数和(自身を含む): 36271872

約数和(自身を除く): 16290225

約数列:

[1, 3, 7, 9, 17, 21, 27, 51, 63, 81, 119, 153, 189, 243, 357, 459, 567, 691, 1071, 1377, 1701, 2073, 3213, 4131, 4837, 6219, 9639, 11747, 14511, 18657, 28917, 35241, 43533, 55971, 82229, 105723, 130599, 167913, 246687, 317169, 391797, 740061, 951507, 1175391, 2220183, 2854521, 6660549, 19981647]

約数ペア:

[(1, 19981647), (3, 6660549), (7, 2854521), (9, 2220183), (17, 1175391), (21, 951507), (27, 740061), (51, 391797), (63, 317169), (81, 246687), (119, 167913), (153, 130599), (189, 105723), (243, 82229), (357, 55971), (459, 43533), (567, 35241), (691, 28917), (1071, 18657), (1377, 14511), (1701, 11747), (2073, 9639), (3213, 6219), (4131, 4837)]