28388997

素因数分解:

$3^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{2039}}^1$

素因数の和:2082

約数の個数: 48

約数和(自身を含む): 53464320

約数和(自身を除く): 25075323

約数列:

[1, 3, 7, 9, 13, 17, 21, 39, 51, 63, 91, 117, 119, 153, 221, 273, 357, 663, 819, 1071, 1547, 1989, 2039, 4641, 6117, 13923, 14273, 18351, 26507, 34663, 42819, 79521, 103989, 128457, 185549, 238563, 242641, 311967, 450619, 556647, 727923, 1351857, 1669941, 2183769, 3154333, 4055571, 9462999, 28388997]

約数ペア:

[(1, 28388997), (3, 9462999), (7, 4055571), (9, 3154333), (13, 2183769), (17, 1669941), (21, 1351857), (39, 727923), (51, 556647), (63, 450619), (91, 311967), (117, 242641), (119, 238563), (153, 185549), (221, 128457), (273, 103989), (357, 79521), (663, 42819), (819, 34663), (1071, 26507), (1547, 18351), (1989, 14273), (2039, 13923), (4641, 6117)]