21103995

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{67}}^1\times {\mathrm{83}}^1$

素因数の和:192

約数の個数: 64

約数和(自身を含む): 39481344

約数和(自身を除く): 18377349

約数列:

[1, 3, 5, 11, 15, 23, 33, 55, 67, 69, 83, 115, 165, 201, 249, 253, 335, 345, 415, 737, 759, 913, 1005, 1245, 1265, 1541, 1909, 2211, 2739, 3685, 3795, 4565, 4623, 5561, 5727, 7705, 9545, 11055, 13695, 16683, 16951, 20999, 23115, 27805, 28635, 50853, 61171, 62997, 83415, 84755, 104995, 127903, 183513, 254265, 305855, 314985, 383709, 639515, 917565, 1406933, 1918545, 4220799, 7034665, 21103995]

約数ペア:

[(1, 21103995), (3, 7034665), (5, 4220799), (11, 1918545), (15, 1406933), (23, 917565), (33, 639515), (55, 383709), (67, 314985), (69, 305855), (83, 254265), (115, 183513), (165, 127903), (201, 104995), (249, 84755), (253, 83415), (335, 62997), (345, 61171), (415, 50853), (737, 28635), (759, 27805), (913, 23115), (1005, 20999), (1245, 16951), (1265, 16683), (1541, 13695), (1909, 11055), (2211, 9545), (2739, 7705), (3685, 5727), (3795, 5561), (4565, 4623)]