21965013

素因数分解:

$3^5\times 7^1\times {\mathrm{37}}^1\times {\mathrm{349}}^1$

素因数の和:408

約数の個数: 48

約数和(自身を含む): 38729600

約数和(自身を除く): 16764587

約数列:

[1, 3, 7, 9, 21, 27, 37, 63, 81, 111, 189, 243, 259, 333, 349, 567, 777, 999, 1047, 1701, 2331, 2443, 2997, 3141, 6993, 7329, 8991, 9423, 12913, 20979, 21987, 28269, 38739, 62937, 65961, 84807, 90391, 116217, 197883, 271173, 348651, 593649, 813519, 1045953, 2440557, 3137859, 7321671, 21965013]

約数ペア:

[(1, 21965013), (3, 7321671), (7, 3137859), (9, 2440557), (21, 1045953), (27, 813519), (37, 593649), (63, 348651), (81, 271173), (111, 197883), (189, 116217), (243, 90391), (259, 84807), (333, 65961), (349, 62937), (567, 38739), (777, 28269), (999, 21987), (1047, 20979), (1701, 12913), (2331, 9423), (2443, 8991), (2997, 7329), (3141, 6993)]