25721289

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{17}}^2\times {\mathrm{29}}^1\times {\mathrm{31}}^1$

素因数の和:111

約数の個数: 72

約数和(自身を含む): 45976320

約数和(自身を除く): 20255031

約数列:

[1, 3, 9, 11, 17, 29, 31, 33, 51, 87, 93, 99, 153, 187, 261, 279, 289, 319, 341, 493, 527, 561, 867, 899, 957, 1023, 1479, 1581, 1683, 2601, 2697, 2871, 3069, 3179, 4437, 4743, 5423, 5797, 8091, 8381, 8959, 9537, 9889, 15283, 16269, 17391, 25143, 26877, 28611, 29667, 45849, 48807, 52173, 75429, 80631, 89001, 92191, 98549, 137547, 168113, 259811, 276573, 295647, 504339, 779433, 829719, 886941, 1513017, 2338299, 2857921, 8573763, 25721289]

約数ペア:

[(1, 25721289), (3, 8573763), (9, 2857921), (11, 2338299), (17, 1513017), (29, 886941), (31, 829719), (33, 779433), (51, 504339), (87, 295647), (93, 276573), (99, 259811), (153, 168113), (187, 137547), (261, 98549), (279, 92191), (289, 89001), (319, 80631), (341, 75429), (493, 52173), (527, 48807), (561, 45849), (867, 29667), (899, 28611), (957, 26877), (1023, 25143), (1479, 17391), (1581, 16269), (1683, 15283), (2601, 9889), (2697, 9537), (2871, 8959), (3069, 8381), (3179, 8091), (4437, 5797), (4743, 5423)]