20872089

素因数分解:

$3^2\times 7^2\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{53}}^1$

素因数の和:139

約数の個数: 72

約数和(自身を含む): 38413440

約数和(自身を除く): 17541351

約数列:

[1, 3, 7, 9, 19, 21, 47, 49, 53, 57, 63, 133, 141, 147, 159, 171, 329, 371, 399, 423, 441, 477, 893, 931, 987, 1007, 1113, 1197, 2303, 2491, 2597, 2679, 2793, 2961, 3021, 3339, 6251, 6909, 7049, 7473, 7791, 8037, 8379, 9063, 17437, 18753, 20727, 21147, 22419, 23373, 43757, 47329, 49343, 52311, 56259, 63441, 122059, 131271, 141987, 148029, 156933, 331303, 366177, 393813, 425961, 444087, 993909, 1098531, 2319121, 2981727, 6957363, 20872089]

約数ペア:

[(1, 20872089), (3, 6957363), (7, 2981727), (9, 2319121), (19, 1098531), (21, 993909), (47, 444087), (49, 425961), (53, 393813), (57, 366177), (63, 331303), (133, 156933), (141, 148029), (147, 141987), (159, 131271), (171, 122059), (329, 63441), (371, 56259), (399, 52311), (423, 49343), (441, 47329), (477, 43757), (893, 23373), (931, 22419), (987, 21147), (1007, 20727), (1113, 18753), (1197, 17437), (2303, 9063), (2491, 8379), (2597, 8037), (2679, 7791), (2793, 7473), (2961, 7049), (3021, 6909), (3339, 6251)]