20777715

素因数分解:

$3^5\times 5^1\times 7^2\times {\mathrm{349}}^1$

素因数の和:383

約数の個数: 72

約数和(自身を含む): 43570800

約数和(自身を除く): 22793085

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 35, 45, 49, 63, 81, 105, 135, 147, 189, 243, 245, 315, 349, 405, 441, 567, 735, 945, 1047, 1215, 1323, 1701, 1745, 2205, 2443, 2835, 3141, 3969, 5235, 6615, 7329, 8505, 9423, 11907, 12215, 15705, 17101, 19845, 21987, 28269, 36645, 47115, 51303, 59535, 65961, 84807, 85505, 109935, 141345, 153909, 197883, 256515, 329805, 424035, 461727, 593649, 769545, 989415, 1385181, 2308635, 2968245, 4155543, 6925905, 20777715]

約数ペア:

[(1, 20777715), (3, 6925905), (5, 4155543), (7, 2968245), (9, 2308635), (15, 1385181), (21, 989415), (27, 769545), (35, 593649), (45, 461727), (49, 424035), (63, 329805), (81, 256515), (105, 197883), (135, 153909), (147, 141345), (189, 109935), (243, 85505), (245, 84807), (315, 65961), (349, 59535), (405, 51303), (441, 47115), (567, 36645), (735, 28269), (945, 21987), (1047, 19845), (1215, 17101), (1323, 15705), (1701, 12215), (1745, 11907), (2205, 9423), (2443, 8505), (2835, 7329), (3141, 6615), (3969, 5235)]