19778157

素因数分解:

$3^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{59}}^1\times {\mathrm{313}}^1$

素因数の和:402

約数の個数: 48

約数和(自身を含む): 35268480

約数和(自身を除く): 15490323

約数列:

[1, 3, 7, 9, 17, 21, 51, 59, 63, 119, 153, 177, 313, 357, 413, 531, 939, 1003, 1071, 1239, 2191, 2817, 3009, 3717, 5321, 6573, 7021, 9027, 15963, 18467, 19719, 21063, 37247, 47889, 55401, 63189, 111741, 129269, 166203, 313939, 335223, 387807, 941817, 1163421, 2197573, 2825451, 6592719, 19778157]

約数ペア:

[(1, 19778157), (3, 6592719), (7, 2825451), (9, 2197573), (17, 1163421), (21, 941817), (51, 387807), (59, 335223), (63, 313939), (119, 166203), (153, 129269), (177, 111741), (313, 63189), (357, 55401), (413, 47889), (531, 37247), (939, 21063), (1003, 19719), (1071, 18467), (1239, 15963), (2191, 9027), (2817, 7021), (3009, 6573), (3717, 5321)]